[[Interface::library]]

Confuse: 'libConfuse' is a configuration file parser library. It supports sections and (lists of) values (strings, integers, floats, booleans or other sections), as well as other features (such as single/double-quoted strings, environment variable expansion, functions and nested include statements). It is easy to add configuration file capability to a program via a simple API. 'libConfuse' is not meant to be a configuration file parser library with a gazillion features; rather, it aims to be easy to use and quick to integrate with your code. 'libConfuse' was formerly called libcfg; the name was changed to avoid confusion with other similar libraries.

Coronet: The coronet library implements an epoll and coroutine based library that allows for async operations over certain kinds of files (any file that supports poll(2) and the O_NONBLOCK fcntl(2) flag can be hosted - like sockets, pipes, ...). The coronet library uses the epoll support available in the 2.6 series of Linux kernels, and the libpcl library for coroutine support.

This is a Python library for CouchDB. It provides a convenient high level interface for the CouchDB server. This package currently encompasses four primary modules:

couchdb.client: the basic client library
couchdb.design: management of design documents
couchdb.schema: a higher-lever API for mapping between CouchDB documents and Python objects
couchdb.view: a CouchDB view server that allows writing view functions in Python

CrackLib: A password checking library.

CreoleParser: Creoleparser is a Python library for converting Creole wiki markup for output on the web. It is a full implementation of the Creole 1.0 specification and aims to follow the spec exactly.

Crypton: Crypton is a software framework for remote storage, where the remote server has no knowledge of what is being stored. The content is encrypted client-side before it reaches the server. The framework is designed to be easy for application developers to use, without needing experience in encryption.

Cssutils: Partly implement the DOM Level 2 CSS interfaces. Additional some cssutils only convenience and (hopefully) more pythonic methods are integrated.

CsvUtils: Transformation utilities for csv (or csv-like) generated rows. The standard csv module is very useful for parsing tabular data in CSV format. Typically though, one or more transformations need to be applied to the generated rows before being ready to be used; for instance "convert the 3rd column to int, the 5th to float and ignore all the rest". This module provides an easy way to specify such transformations upfront instead of coding them every time by hand. Two classes are currently available, SequenceTransformer and MappingTransformer, that represent each row as a list (like csv.reader) or dict (like csv.DictReader), respectively.

CuTest: 'CuTest' is a unit tesing library for the C language whose tests ensure that your code keeps working as you make small changes in it. They tell you which subroutine is broken, so you can more quickly figure out what's broken. You can also keep adding to your old code without worrying about bad interactions: if there is a bad interaction the tests will catch it. Finally, if every time a bug is reported you write a quick test, you will guarantee that the bug never reappears.

Cuba: The Cuba library offers a choice of four independent routines for multidimensional numerical integration: Vegas, Suave, Divonne, and Cuhre. They work by very different methods, first three are Monte Carlo based. All four have a C/C++, Fortran interface and can integrate vector integrands. Their invocation is very similar, so it is easy to substitute one method by another for cross-checking. For further safeguarding, the output is supplemented by a chi-square probability which quantifies the reliability of the error estimate.

Curl: cURL is a command line tool for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, Telnet and TFTP. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, cookies, file transfer resume, user+password authentication (Basic, Digest, NTLM, Negotiate, kerberos...), proxy tunneling, and so on.
llibcurl
The client-side URL transfer library that the cURL command line tool uses to transfer data. In some distributions, this library is packaged separately.

CwMtx: 'CwMtx' provides the matrix and vector operations used in engineering and science problems, particularly the quaternion class which implements quaternion math. Quaternions are useful for attitude determination in 3D space because they do not suffer from singularities. Furthermore, successive rotations and transformations of vectors can be accomplished by simple quaternion multiplication. Attitude dynamics can be expressed in a very compact form using quaternions.

D3.js: JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS. D3's emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.

DSSI: DSSI is an API for audio plugins, with particular application for software synthesis plugins with native user interfaces. DSSI is an open specification developed for use in GNU/Linux audio applications, although it is portable to other platforms. It may be thought of as LADSPA-for-instruments, or something comparable to VSTi. This package contains the header file required for compiling hosts and plugins.

DUNE-Common

DUNE, the Distributed and Unified Numerics Environment is a modular toolbox for solving partial differential equations (PDEs) with grid-based methods. It supports the easy implementation of methods like Finite Elements (FE), Finite Volumes (FV), and also Finite Differences (FD). DUNE is free software licensed under the GPL (version 2) with a so called "runtime exception" (see license). This licence is similar to the one under which the libstdc++ libraries are distributed. Thus it is possible to use DUNE even in proprietary software. The underlying idea of DUNE is to create slim interfaces allowing an efficient use of legacy and/or new libraries. Modern C++ programming techniques enable very different implementations of the same concept (i.e. grids, solvers, ...) using a common interface at a very low overhead. Thus DUNE ensures efficiency in scientific computations and supports high-performance computing applications. DUNE is based on the following main principles:

Separation of data structures and algorithms by abstract interfaces.- This provides more functionality with less code and also ensures maintainability and extendability of the framework.
Efficient implementation of these interfaces using generic programming techniques.
Static polymorphism allows the compiler to do more optimizations, in particular function inlining, which in turn allows the interface to have very small functions (implemented by one or few machine instructions) without a severe performance penalty. In essence the algorithms are parametrized with a particular data structure and the interface is removed at compile time. Thus the resulting code is as efficient as if it would have been written for the special case.
Reuse of existing finite element packages with a large body of functionality.- In particular the finite element codes UG, ALBERTA, and ALUGrid have been adapted to the DUNE framework. Thus, parallel and adaptive meshes with multiple element types and refinement rules are available. All these packages can be linked together in one executable.
The framework consists of a number of modules which are downloadable as separate packages. The current core modules are:
dune-common- contains the basic classes used by all DUNE-modules. It provides some infrastructural classes for debugging and exception handling as well as a library to handle dense matrices and vectors.
dune-grid- is the most mature module. It defines nonconforming, hierarchically nested, multi-element-type, parallel grids in arbitrary space dimensions. Graphical output with several packages is available, e.g. file output to IBM data explorer and VTK (parallel XML format for unstructured grids). The graphics package Grape has been integrated in interactive mode.
dune-istl (Iterative Solver Template Library)- provides generic sparse matrix/vector classes and a variety of solvers based on these classes. A special feature is the use of templates to exploit the recursive block structure of finite element matrices at compile time. Available solvers include Krylov methods, (block-) incomplete decompositions and aggregation-based algebraic multigrid.

DUNE-Grid

Separation of data structures and algorithms by abstract interfaces.- This provides more functionality with less code and also ensures maintainability and extendability of the framework.
Efficient implementation of these interfaces using generic programming techniques.
Static polymorphism allows the compiler to do more optimizations, in particular function inlining, which in turn allows the interface to have very small functions (implemented by one or few machine instructions) without a severe performance penalty. In essence the algorithms are parametrized with a particular data structure and the interface is removed at compile time. Thus the resulting code is as efficient as if it would have been written for the special case.
Reuse of existing finite element packages with a large body of functionality.- In particular the finite element codes UG, ALBERTA, and ALUGrid have been adapted to the DUNE framework. Thus, parallel and adaptive meshes with multiple element types and refinement rules are available. All these packages can be linked together in one executable.
The framework consists of a number of modules which are downloadable as separate packages. The current core modules are:
dune-common- contains the basic classes used by all DUNE-modules. It provides some infrastructural classes for debugging and exception handling as well as a library to handle dense matrices and vectors.
dune-grid- is the most mature module. It defines nonconforming, hierarchically nested, multi-element-type, parallel grids in arbitrary space dimensions. Graphical output with several packages is available, e.g. file output to IBM data explorer and VTK (parallel XML format for unstructured grids). The graphics package Grape has been integrated in interactive mode.
dune-istl (Iterative Solver Template Library)- provides generic sparse matrix/vector classes and a variety of solvers based on these classes. A special feature is the use of templates to exploit the recursive block structure of finite element matrices at compile time. Available solvers include Krylov methods, (block-) incomplete decompositions and aggregation-based algebraic multigrid.

DUNE-ISTL

Separation of data structures and algorithms by abstract interfaces.- This provides more functionality with less code and also ensures maintainability and extendability of the framework.
Efficient implementation of these interfaces using generic programming techniques.
Static polymorphism allows the compiler to do more optimizations, in particular function inlining, which in turn allows the interface to have very small functions (implemented by one or few machine instructions) without a severe performance penalty. In essence the algorithms are parametrized with a particular data structure and the interface is removed at compile time. Thus the resulting code is as efficient as if it would have been written for the special case.
Reuse of existing finite element packages with a large body of functionality.- In particular the finite element codes UG, ALBERTA, and ALUGrid have been adapted to the DUNE framework. Thus, parallel and adaptive meshes with multiple element types and refinement rules are available. All these packages can be linked together in one executable.
The framework consists of a number of modules which are downloadable as separate packages. The current core modules are:
dune-common- contains the basic classes used by all DUNE-modules. It provides some infrastructural classes for debugging and exception handling as well as a library to handle dense matrices and vectors.
dune-grid- is the most mature module. It defines nonconforming, hierarchically nested, multi-element-type, parallel grids in arbitrary space dimensions. Graphical output with several packages is available, e.g. file output to IBM data explorer and VTK (parallel XML format for unstructured grids). The graphics package Grape has been integrated in interactive mode.
dune-istl (Iterative Solver Template Library)- provides generic sparse matrix/vector classes and a variety of solvers based on these classes. A special feature is the use of templates to exploit the recursive block structure of finite element matrices at compile time. Available solvers include Krylov methods, (block-) incomplete decompositions and aggregation-based algebraic multigrid.

Dajax: Dajax, the new easy to use ajax library for your django projects. All the power of ajax now available for django.

Database Template Library: The Database Template Library makes ODBC recordsets look just like STL containers. Users move through containers using standard STL iterators, and if they insert(), erase(), or replace() records in the containers, changes are automatically committed to the database. Since 'dtl' complies with STL iterator and container standards, users can plug abstractions into a range of STL algorithms for data storage, searching, and manipulation. The C++ reflection mechanism used to bind to database tables lets users add generic indexing and lookup properties to the containers without requiring special code. Since the code takes full advantage of the template mechanism, 'dtl' adds minimal overhead (compared with using raw ODBC calls).

DataparkSearch

DataparkSearch is an Internet and Intranet search engine tool. Key features:

Support for http, https, ftp, nntp and news URL schemes.
htdb virtual URL scheme support for indexing SQL databases.
text/html, text/xml, text/plain, audio/mpeg (MP3) and image/gif mime types built-in support.
External parsers support for other document types.
Ability to index multilangual sites using content negotiagion.
Searching all of the word forms using ispell affixes and dictionaries.
Stopwords and synonyms lists.
Boolean query language support.
Results sorting by relevancy, popularity rank, last modified time and by importance (a multiplication of relevancy and popularity rank).
Various character sets support.
Accent insensitive search.
Phrases segmenting for Chinese, Japanese, Korean, and Thai.
mod_dpsearch - search module for Apache web server.
Internationalized Domain Names support

Date Calc: The Date::Calc package consists of a C library and a Perl module (which uses the C library internally) for all kinds of date calculations based on the Gregorian calendar (the one used in all Western countries today), thereby complying with all relevant norms and standards: ISO/R 2015-1971, DIN 1355 and, to some extent, ISO 8601 (where applicable). The package is designed as a toolbox, not a ready-made application. It provides extensive documentation and examples of use, multi-language support, and special functions for business needs. The C library is specifically designed so that it can be used stand-alone, without Perl. Version 5.0 features date objects with overloaded operators, and a set of modules for calculations which take legal holidays into account (both in Perl only).

Dbug: dbug is a macro-based library to see program flow, variables, timings, errors, warnings, etc.

Dead Souls: The Dead Souls MUD Library is a multi-user, text based adventure creation system. It lets you build adventure games which can be played over the Internet simultaneously by many people. It is for both experienced and beginner MUD admins. It includes an easy-to-use creation system.

Deal.II: 'deal.II' is a software library that supports finite element computations on adaptive 1d, 2d, and 3d meshes. It comes with mesh handling, supports a large number of finite elements, can input and output in various formats, and has a large collection of support classes. The handling of different space dimensions is hidden behind C++ templates; this lets users treat problems in different space dimensions simultaneously within the same program, and to switch dimensions simply by recompilation. This means users can test their application in 2d, and then run production runs in 3d without having to debug the program again. It comes with full documentation of all APIs and 18 example programs showing how to build finite element programs from simple to very complex. The documentation now runs about 4000 pages.

Debea Database Library: Debea is an Object Relational Mapping library (ORM) for C++. It allows you to map C++ objects to relations in various SQL and file databases.

Decibel: Decibel is a realtime communication framework based on Telepathy. It is meant to integrate VoIP, text chat, CTI (computer telephone integration), and similar applications into the user's desktop. Decibel consists of a desktop neutral policy daemon called Houston and desktop specific components for user interaction.

Deliantra Archetypes: Deliantra is a free software cooperative multiplayer RPG and adventure game, much similar in style (and setting) to nethack and moria, but is fully graphical and runs in realtime. It is set in a classical medieval environment with ubiquitous weapons and magic. What makes this game special is its depth and the sheer amount of maps to explore: The world is vast (multiple continents, over 4000 manually designed maps, hundreds of monsters and countless variations of generated content) and complex (16 unique races, 17 classes, 40 skills and hundreds of spells to choose from and combine with each other), so there is a lot to explore. The game play is open and sets very few limits on character development. And of course a lot of fun is to be had by playing cooperatively with others exploring the same world.

Detect: 'detect' can be used in any program that needs hardware detection features such as configuration tools, installation programs, etc. You can use it to detect sound cards, CPUs, networking devices, webcams, joysticks, etc. It scans the IDE, PCI, ISA, USB, and SCSI busses to find hardware.

Developer's Image Library: Developer's Image Library (DevIL) is a cross-platform image library utilizing a simple syntax to load, save, convert, manipulate, filter, and display a variety of images with ease.

Device-Cdio: Device::Cdio is a interface to the GNU CD Input and Control library (libcdio) and it's ISO 9660 library (libiso9660) which are written in C. The library encapsulates CD-ROM reading and control and ISO 9660 handling. Perl programs wishing to be oblivious of the OS- and device-dependent properties of a CD-ROM can use this library.

DiVinE: DiVinE is an extensible system for distributed formal verification of concurrent systems. DiVinE as such can be viewed from two very different points of view: as a tool for distributed state space analysis and LTL model-checking, and as a development and fast prototyping environment.

DiaCanvas2: DiaCanvas2 is a flexible diagramming widget based on GnomeCanvas. It uses its own constraint solver to maintain object relationships. It is Model/View/Controller-based and makes full use of GnomeCanvas' features, and can rotate/shear/resize/etc objects without recalculating shapes. It includes export facilities for both GnomePrint and SVG. Except for its look and feel, DiaCanvas is not related to the diagramming tool DIA.

Diet libc: Diet libc is a C library that is optimized for small size. It has has the bare minimum of files: the system call wrappers (including socket stuff) and malloc, etc. to create small statically linked binaries under Sparc, x86, PPC, ARM, MIPS, and Alpha-Linux.

Dimnum: The dimnum library contains templated C++ classes for storage and manipulation of dimensionful numbers, as encountered in physics and engineering. Since it uses templates, there is no size or speed penalty with respect to normal variables (depending on compiler optimisations).

DirectFB: 'DirectFB' is a thin library that provides developers with hardware graphics acceleration, input device handling and abstraction, an integrated windowing system with support for translucent windows and multiple display layers on top of the framebuffer device. It is a complete hardware abstraction layer with software fallbacks for every graphics operation that is not supported by the underlying hardware.

Dmbcs-kraken-api: Kraken is a virtual currency exchange, which also handles fiat (real) currency amounts. Subscribers to the service have an account with associated funds attached. The web site (www.kraken.com) provides the user with an account overview (i.e. current balance), currency-pair exchange market status (history of prices and current order book), and the means to place entries on the order book; bids for a currency which can be immediately met with orders to sell the currency are automatically transacted, with the Kraken site taking a small and variable cut of the deal. Kraken also provide a stateless, web-based API by which all of the above actions can be undertaken programmatically. This is fully open, and described at the Kraken exchange web site. The DMBCS client-side C++ library implements all features of the API in a fully encapsulated C++ class, allowing users to implement algorithmic or robotic trading and dynamic exchange modelling.

Doodle: Doodle quickly searches the documents on a computer, then builds an index using meta-data contained in the documents and allows fast searches on the resulting database. It supports approximate searches and full-text indexing, and comes with a library for accessing the doodle database and making it easy to integrate doodle's functionality into other applications or user interfaces. Users can keep the doodle database always up-to-date by updating the database on-the-fly by using 'doodled' and 'fam' whenever files on the system change. They can also build one doodle database for all users on a multi-user system without compromising user privacy.

Duktape

Duktape is easy to integrate into a C/C++ project: add duktape.c, duktape.h, and duk_config.h to your build, and use the Duktape API to call ECMAScript functions from C code and vice versa.

Main features

Embeddable, portable, compact: can run on platforms with 160kB flash and 64kB RAM
ECMAScript E5/E5.1, with some semantics updated from ES2015+
Partial support for ECMAScript 2015 (E6) and ECMAScript 2016 (E7), see Post-ES5 feature status and kangax/compat-table
ES2015 TypedArray and Node.js Buffer bindings
CBOR bindings
Encoding API bindings based on the WHATWG Encoding Living Standard
performance.now()
Built-in debugger
Built-in regular expression engine
Built-in Unicode support
Minimal, retargetable platform dependencies
Combined reference counting and mark-and-sweep garbage collection with finalization
Coroutines
Property virtualization using a subset of ECMAScript ES2015 Proxy object
Bytecode dump/load for caching compiled functions
Distributable includes an optional logging framework, CommonJS-based module loading implementations, etc
Liberal license (MIT)

Duro

The goal of the Duro project is to create a library which is as compliant with the proposed database language D as it is possible for a C library. This library is supposed to serve as a basis for a truly relational database management system (TRDBMS).

Tuples and tables (relvars).
Relational algebra: RENAME, select (restrict), project, EXTEND, JOIN, SEMIJOIN, UNION, INTERSECT, MINUS, SEMIMINUS, SUMMARIZE PER, DIVIDEBY PER, WRAP, UNWRAP, GROUP, and UNGROUP.
Virtual tables (views).
Locking and nested transactions.
Duro tables are true sets -- uniqueness of tuples (rows) is always enforced. When creating real tables, at least one candidate key must be supplied. A candidate key may be empty.
User-defined types (including type constraints) and operators.
Declarative integrity.
Tcl interface, including support for relational expressions in Tutorial D syntax and operators implemented in Tcl ("stored procedures").
Simple GUI admin tool.

xs Duro is implemented on top of the Berkeley DB database library.

DynObj

DynObj is a C/C++ library for cross compiler plugin libraries. It enables exposing and sharing run-time type information for C++ classes. This allows for loading binary plugins, and interacting with them in type safe ways:

A program working with sound can install additional effect filters while running.
A file manager can add plugins that handles new archive types.
Or it can add file popup menu handlers, or toolbar commands from plugins.
A text editor can add an editing mode (say Python editing) when the text editor is running.
So, plugins can make a static application a lot more dynamic. And DynObj does this in a generic, type safe way.

EHS: The Embedded HTTP Server (EHS) is a C++ class which can be inherited from to give HTTP server functionality to any class or application. It supports form data via POST or GET, and uploads via multi-part form attachments. It is useful for adding Web-based administration or statistics to any C++ program.

EMAN: EMAN is a scientific image processing suite designed mainly to perform single-particle reconstructions of individual molecules. In this method, a transmission electron microscope is used to collect images of thousands of individual molecules. A complex series of algorithms then turns the individual 2D images into a high-resolution 3D structure of the molecule. The core of EMAN is a C++ based scientific image processing library.

EMI TOC Generator: eMI TOC Generator is a simple cross-platform library that dynamically generates a table of contents (TOC) in an HTML 5 page on rendering.

EMI User Controls Library: eMI User Controls Library is a library for the .NET Framework that provides a closeable tab item for the tab control of the Windows Presentation Framework (WPF) and a file system browser window.

EMI eMailer: eMI eMailer is a simple cross-platform object-oriented SMTP client implemented in PHP. It is primarily intended to transfer MIME e-mail messages generated by PHP on the same host as the SMTP server of the sender.

ETS- Enthought Tool Suite: The Enthought Tool Suite (ETS) is a collection of components developed by Enthought and our partners, which we use every day to construct custom scientific applications. This project is a "meta-project wrapper" that bundles up all the other projects in ETS.

EXcavator: eXcavator is an XML query processing class for PHP. Queries are constructed using a small query language, and query results are returned as either loosely formed or strict XML, in formats suitable for both text and HTML. One of eXcavator's most useful features is its facility to insert query results into user-defined templates, which allow for a free interpolation of user text and the data extracted by the query. It runs on top of XML_PullParser, but uses a completely independent API. However, it does offer opportunities to use the facilities of both packages side by side for programmers familiar with both.

EZWGL: EZwgl is a library of C functions, based on Xlib, whose purpose is to provide a tool that simplifies the task of graphical user interface (GUI) programming under the X window system environment. It is best for building a nice graphical user interface for an application, or for graphics programming under the X window system programming environment. EZWGL supports application resources, geometry management and drag-and-drop. It also includes about 100 OpenGL(TM)-like graphics functions and procedures that provides high level support for 3D graphics, including features like zbuffer, double-buffer and lighting.

Easyval: 'Easyval' is a basic implementation of interval arithmetic that uses hardware doubles as interval bounds. The first goal of this library is to respect the interval arithmetic containment criterium.

Ecc: 'ecc' is a class library for working with elliptic curves in cryptography. It consists of a set of TCP/IP client server examples for digital signature, encryption, and key exchange (such as Diffie-Hellman key exchangei, Massey Omura encryption, or DSA style signatures in the elliptic curve case).

Edlib: Lightweight, super fast C/C++ library for sequence alignment using edit distance.

Edma: EDMA is library that implements several object oriented features in plain C. The GNU/EDMA system is a framework designed to provide object oriented programming and component based features to generic applications, despite of the underlying programming language. The system is physically a library plus a set of language bindings that provides a development environment and a set of functions for object-oriented programming and component-based development. Its name is an acronym for Entorno de Desarrollo Modular y Abierto.

Elektra: Elektra is a configuration management framework, it mounts configuration files into global keys database creating sort of virtual file system for easier access, changing and locating the configuration parameters. A wide range of plugins is available used to specify format (JSON, INI, XML and others), default settings , validation, etc. Use High-level API to elektrify your application for easier maintenance and generate type-safe configuration access code based on same specification used for validation. The core is the library implemented in C, bindings to another languages are provided.

Element Tree: The Element type is a simple but flexible container object, designed to store hierarchical data structures, such as simplified XML infosets, in memory. The element type can be described as a cross between a Python list and a Python dictionary. The ElementTree wrapper type adds code to load XML files as trees of Element objects, and save them back again. The Element type is available as a pure-Python implementation for Python 1.5.2 and later. A C implementation is also available, for use with CPython 2.1 and later. The core components of both libraries are also shipped with Python 2.5 and later.

Elib

Elib is designed as a collection of useful routines that don't have to be reinvented each time a new program is written. It contains code for container data structures, minibuffer and string handling functions missing in standard GNU Emacs, and routines for handling lists of cookies in a buffer.

Elib has been decommissioned as a separate package since its useful functions have long since been included in Emacs.

Emacs Common Lisp: Emacs Common Lisp is an implementation of Common Lisp, written in Emacs Lisp. The implementation provides a Common Lisp environment, separate from Emacs Lisp, running in Emacs. It does not intend to extend Emacs Lisp with Common Lisp functionality; however, Emacs Lisp functions can call Common Lisp functions and vice versa.

Enca: 'Enca' (Extremely Naive Charset Analyser) detects the encoding of text files, based on knowledge of their language. It can also convert them to other encodings, letting you to recode files without knowing their current encoding. It supports most of Central and East European languages, and a few Unicode variants, independently of language.

Enlightenment: Enlightenment is a themeable, fast, flexible, and powerful window manager that runs on everything from small mobile devices to powerful multi-core desktops. The Enlightenment Foundation Libraries (EFL) comprise a suite of libraries to help you create beautiful user interfaces.

EnthoughtBase

* " This package has now been DEPRECATED since ETS 4.0. These functionalities have now been moved into other projects: 'etsconfig' is now part of traits, 'logger' is now part of apptools and 'util' is now part of pyface, and other packages. The etsproxy project allows you to run code that relied on this package or to convert source code to the new namespace with the 3to4 utility. " The EnthoughtBase project includes a few core packages that are used by many other projects in the Enthought Tool Suite:

etsconfig: Supports configuring settings that need to be shared across multiple projects or programs on the same system. Most significant of these is the GUI toolkit to be used. You can also configure locations for writing application data and user data, and the name of the company responsible for the software (which is used in the application and user data paths on some systems).
logger: Provides convenience functions for creating logging handlers.
util: Provides miscellaneous utility functions.

Epeios: The purpose of this project was to develop a framework to make powerful, reliable software components that could be used whatever the target platform, the environment or the interface in use. The project source code currently contains useful applications and undocumented related libraries. Among all the software components available, there is, for example, MMUAq, an application which allows to handle several mail accounts as a global one. As each one, it is based on the Epeios framework.

Ephemeris: 'Ephemeris' reads, writes, and interpolates the JPL planetary ephemeris data that is the world standard planetary dataset. It should compile on any machine that uses gcc and supports IEEE floating point arithmetic, and has been tested under GNU/Linux. It uses an included library, gnulliver.c, that automatically handles integer and floating point Big-endian/Little-endian byte swapping to match Big-endian/network order on any computer. gnulliver.c can be used separately under the LGPL 2.1. This is a redesign of JPL's original FORTRAN code, available on JPL's FTP website (ftp://ssd.jpl.nasa.gov/pub/eph/export/), with some added flexibility (including patching some inconsistencies in the original JPL data files). 'Ephemeris' is not associated with JPL or NASA, but just uses JPL's data.

Epix: 'ePiX', a collection of batch programs, creates mathematically accurate fgures, plots, and animations containing LaTeX typography. The input syntac is easy to learn. The output -- vector image files or LaTeX picture-like environments -- is expressly designed for use with LaTeX.

Epto: 'epto' is a library for industrial strength shell script programming with sh. It features convenient error handling, tracing, logging, option handling, documentation template, process level transaction safety (sort of), and more. It takes less than five minutes of learning to start using it.

ExactImage: ExactImage is a fast C++ image processing library. Unlike ImageMagick, it allows operation in several color spaces and bit depths natively, resulting in much lower memory and computational requirements. Some optimized algorithms operate in 1/20 of the time ImageMagick requires, and displaying large images can be as fast as 1/10 of the time the "display" program takes.

Experimental Robotics Framework: The Experimental Robotics Framework is a framework for developing composable applications. The idea is to develop software components that interact with others previously developed in other applications and other components developed by other researchers. It is not a new concept in the field, it is very similar to IBM eclipse but in this case for 3d applications and based on C++ instead of Java.

FAM: FAM, the File Alteration Monitor, provides an API which applications can use to be notified when specific files or directories are changed. It comes in two parts: fam, the daemon which listens for requests and delivers notification, and libfam, a library which client applications can use to communicate with fam

FANN: Fast Artificial Neural Network Library (fann) implements multi-layer feedforward networks that support both fully connected and sparsely connected networks. It supports execution in fixed point arithmetic to allow for fast execution on systems with no floating point processor. To overcome the problems of integer overflow, the library calculates a position of the decimal point after training and guarantees that integer overflow cannot occur with this decimal point. FANN is designed to be fast, versatile, and easy to use. Several benchmarks have been executed to test its performance. It is significantly faster than other libraries on systems without a floating point processor, and comparable to other highly optimized libraries on systems with a floating point processor.

FINAL CUT: The FINAL CUT is a C++ class library and widget toolkit with full mouse support for creating a text-based user interface. The library supports the programmer to develop an application for the text console. It allows the simultaneous handling of multiple text windows on the screen. The structure of the Qt framework was originally the inspiration for the C++ class design of FINAL CUT. It provides common controls like dialog boxes, push buttons, check boxes, radio buttons, input lines, list boxes, status bars and so on.

FLIF: FLIF is a novel lossless image format which outperforms existing image formats in terms of compression ratio. It works well on any kind of image (photographic, line art, computer graphics, etc.) and also supports animations. FLIF images (or animations) can be progressively decoded, which makes the format potentially very suitable for responsive web design. This is the reference implementation of FLIF, which includes a command-line tool (flif) to convert between FLIF and PNG/PNM/PAM, a decoding library (libflif_dec), an encoding library (libflif_enc), some scripts (gif2flif, apng2flif, raw2flif, ...), and a simple image/animation viewer (viewflif).

FXT: 'FXT' is a C++ library containing code for various fast orthogonal transforms and related algorithms for real, complex, n-dim fourier transforms, hartley transform, 1dim and 2dim, number theoretic transforms, walsh, haar, and wavelet transforms, convolution, correlation and power spectrum, mass-storage FFTs and convolution, fast multiplication routines, sine and cosine transforms, and z-transform.

Farstream: The Farstream (formerly Farsight2) project is an effort to create a framework to deal with all known audio/video conferencing protocols. On one side it offers a generic API that makes it possible to write plugins for different streaming protocols, on the other side it offers an API for clients to use those plugins. This package provides Python bindings for Farstream.

Fast rendering toolkit: FRT is a toolkit for the generation of 3D animations using low-end machines (slow CPUs, low memory and small harddisks); of course, you can still use it with higher-end machines. The program is simple; the whole library is about 1000 lines of code. FRT has been designed with a *NIX-like operating system in mind: to avoid filling the harddisk, FRT establishes a master/slave relationship with mpeg_encode and renders frames on demand.

Fastclick: The aim is to make your application feel less laggy and more responsive while avoiding any interference with your current logic. FastClick is developed by FT Labs, part of the Financial Times.

Fftw: C subroutine library for computing the Discrete Fourier Transform in one or more dimensions, of both real and complex data, and of arbitrary input size. The FFTW team's benchmarks, performed on a variety of platforms, show that FFTW's performance is typically superior to that of other publicly available FFT software. Moreover, FFTW's performance is portable: the program will perform well on most architectures without modification. However, FFTW appears to be the fastest program most of the time for in-order transforms, especially in the multi-dimensional and real-complex cases.

FireDNS: This is a candidate for deletion: Links broken. No links to page. Email to maintainer broken. Poppy-one (talk) 12:09, 30 July 2018 (EDT) 'libfiredns' is a library for handling asynchronous DNS requests. It provides a very simple interface for sending requests and parsing reponses, as well as low-timeout blocking functions. 'libfiredns' functions have much lower timeouts than the stock functions and tend to be faster because they send requests to all configured system nameservers at the same time.

FireString: This is a candidate for deletion: Links broken. No links to page. Email to maintainer broken. Poppy-one (talk) 12:18, 30 July 2018 (EDT) FireString is a library to make string handling easier in C. It provides replacements for some non-ANSI libc string functions, binary and length-safe string functions, and an interface for easy, intelligent configuration file parsing.

Firehose: Firehose is a simple library which stripes multiple, inexpensive, network devices to provide very high speed data transfers. It will support any number of devices as long as each device has a TCP/IP layer.

Flate: This is a candidate for deletion: Links broken. No links to page. Email to maintainer broken. Poppy-one (talk) 03:41, 31 July 2018 (EDT) Flate is a template library used to deal with HTML code in CGI applications. It includes C and Perl support. All HTML code is put in an external file (the template) and printed using the library functions: variables, zones (parts to be displayed or not), and tables (parts to be displayed 0 to n times). You don't need to modify/recompile your application when modifying HTML code, printing order doesn't matter in your CGI code, and your CGI code is cleaner.

Fontconfig

fontconfig is a library for customizing and configuring fonts in a system, providing configuration, enumeration and substitution of fonts to other programs. Applications can use fontconfig in two ways:

by querying it for the available fonts on the system, or
by querying it for a font matching certain parameters (comprising a pattern) as closely as possible.

To perform font matching, fontconfig stores typesetting information about all of the installed fonts, including the name of the font family, style, weight, dots per inch (DPI), and Unicode coverage. This information is also used to perform font substitution.

Features

fontconfig can:

discover new fonts when installed automatically, removing a common source of configuration problems.
perform font name substitution, so that appropriate alternative fonts can be selected if fonts are missing.
identify the set of fonts required to completely cover a set of languages.
have GUI configuration tools built as it uses an XML-based configuration file (though with autodiscovery, we believe this need is minimized).
efficiently and quickly find the fonts you need among the set of fonts you have installed, even if you have installed thousands of fonts, while minimizing memory usage.
be used in concert with the X Render Extension and FreeType to implement high quality, anti-aliased and subpixel rendered text on a display.

fontconfig does not:

render the fonts themselves (this is left to FreeType or other rendering mechanisms)
depend on the X Window System in any fashion, so that printer only applications do not have such dependencies

Fontutils: The GNU Font Utilities (a.k.a. Fontutils) create fonts for use with Ghostscript or TeX. They also contain general conversion programs and other utilities. Some of the programs in Fontutils include bpltobzr, bzrto, charspace, fontconvert, gsrenderfont, imageto, imgrotate… The main purpose of these programs is to form a tool chain to generate Metafont or PostScript fonts from scanned images.

Form Alchemy: FormAlchemy eliminates boilerplate by autogenerating HTML input fields from a given model. FormAlchemy will try to figure out what kind of HTML code should be returned by introspecting the model's properties and generate ready-to-use HTML code that will fit the developer's application. Of course, FormAlchemy can't figure out everything, i.e, the developer might want to display only a few columns from the given model. Thus, FormAlchemy is also highly customizable.

FreeLing

The FreeLing package consists of a library providing language analysis services. FreeLing is designed to be used as an external library from any application requiring Natural Language Processing services (machine translators, intelligent web searchers, automatic summarizers, NL interfaces, etc.) Also, a simple main program is also provided as a basic interface to the library, which enables the user to analyze text files from the command line. Current version analyzes text in English, Spanish, Catalan, Galician, and Italian. New languages can be easily added if linguistic data are available.

Features:
Text tokenization
Sentence splitting.
Morphological analysis.
Named entity detection.
Date/number/currency/ratios recognition.
Physical magnitudes detection (speed, weight, temperature, density, etc.)
PoS tagging.
Named entity classification.
Chart-based shallow parsing.
WordNet based sense annotation
Dependency parsing.

Freecell Solver: Freecell Solver is a library written in C, that automatically solves layouts of Freecell and similar Solitaire variants (including Simple Simon boards). It is accompanied by several stand-alone command line programs.

Freeipmi: FreeIPMI is a collection of in-band and out-of-band IPMI software in accordance with the IPMI v1.5/2.0 specification. These programs provide a set of interfaces for platform management. Common functionality includes sensor monitoring, system event monitoring, power control and serial-over-LAN.

FtpUtil: ftputil is a high-level FTP client library for the Python programming language. ftputil implements a virtual file system for accessing FTP servers, that is, it can generate file-like objects for remote files. The library supports many functions similar to those in the os, os.path and shutil modules. ftputil has convenience functions for conditional uploads and downloads, and handles FTP clients and servers in different timezones.

FuzzPy: Library for fuzzy sets, fuzzy graphs, and general fuzzy mathematics for Python.

G-golf ,: GNU G-Golf (GNOME: (Guile Object Library for)) G-Golf is a tool to develop fast and feature-rich graphical applications, with a clean and recognizable look and feel. Here is an overview of the GNOME platform libraries, accessible using G-Golf. In particular, libadwaita provides a number of widgets that change their layout based on the available space. This can be used to make applications adapt their UI between desktop and mobile devices. The GNOME Web (best known through its code name, Epiphany, is a good example of such an adaptive UI. G-Golf uses Glib, GObject and GObject Introspection. As it imports a Typelib (a GObject introspectable library), G-Golf defines GObject classes as GOOPS (the Guile Object Oriented System) classes. GObject methods are defined and added to their corresponding generic function. Simple functions are defined as scheme procedures.

G-wrap: 'G-Wrap' is a tool (and Guile library) for generating function wrappers for inter-language calls. It currently supports generating Guile wrappers for C functions.

GAIL: 'GAIL' is a GTK+ module that provides accessibility support for GTK+ and libgnomecanvas by implementing AtkObjects for widgets in the two libraries. For example, if the module is loaded in a program which calls gtk_widget_get_accessible() for a GtkEntry, an instance of GailEntry is returned. This module is normally used with the atk-bridge GTK+ module from at-spi to allow an assistive technology, e.g a screenreader, to query or drive the program.

GAUL: The Genetic Algorithm Utility Library (GAUL) is a programming library designed to assist in the development of code requiring genetic algorithms. The steady-state, generation based and the island model of evolution are supported, using the Darwinian, Lamarkian or Baldwininan evolutionary schemes. Standard mutation, crossover and selection operators are provided, while code hooks additionally allow custom operators. It provides data structures and functions for handling and manipulation of the data required for a genetic algorithm. Additional stochastic algorithms are provided for comparison to the genetic algorithms. Much of the functionality is also available through a simple S-Lang interface.

GDL: The Gnu Data Language (GDL) is a free alternative to the data visualization and analysis tool, called IDL (Interactive Data Language), frequently used by scientists. GDL and its library routines are designed as a tool for numerical data analysis and visualisation. GDL is dynamically typed, vectorized and has object-oriented programming capabilities. The library routines handle numerical calculations, data visualisation, signal/image processing, file input/output (incl. graphical and scientific data formats such as TIFF, PNG, netCDF, HDF etc) and interaction with host OS. Despite its name, GDL is not a GNU package.

GDSL: The Generic Data Structures Library (GDSL) is a collection of routines for generic data structures manipulation. It is a portable and re-entrant library designed to let C programmers access common data structures with powerful algorithms and hidden implementation. Available structures are lists, queues, stacks, hash tables, binary trees, binary search trees, red-black trees, 2D arrays, and permutations.

GEGL: GEGL is a graph-based image processing framework offering non-destructive image processing and compositing on large images. It is suitable for projects ranging from small one-off projects to interactive applications.

GEOS: 'GEOS' is a C++ implementation of the functions and predicates defined in the OpenGIS "Simple Features for SQL" specification. It includes high quality implementations of all important spatial relationships and operations, robust versions of all functions in the dimensionally extended 9 intersection predicate model, and implementations of the operators Buffer(), Union(), and Intersection() and all other SFSQL functions including Area(), Length(), Centroid(), etc.

GGZ Gaming Zone: The GGZ Gaming Zone develops a free gaming environment, based on a client-server architecture. More than 20 games are already available directly from the project, and integration into the major free desktops like KDE and GNOME is also being done. Player privacy, lack of advertisements and source code availability for game routine verification make this project a reliable platform for free games. Several independent game projects do already support playing over GGZ.

GJrand: A programmer's library for random numbers. Also random number generator testing code. Intended for simulation, games and "Monte-Carlo" algorithms.

GLTT: 'GLTT' is a library that allows you to read and draw TrueType fonts in any OpenGL application. It supports bitmapped and anti-aliased font drawing as well as vectorized and polygonized drawing.

GMM: The Guarded Memory Move tool is useful for studying buffer overflows and catching them together with a "good" stack image. Once a stack overflow has been exploited, the back trace is already gone, as is information about parameters and local variables that are very important in understanding how the attacker is working out the exploit. The GMM library uses dynamic function call interception to catch the most common functions that attackers use to exploit stack buffers. It uses the LD_PRELOAD capability and offers two services: first, it avoids buffer overflow to allow the attacker to execute shell-code on your machine. Second, where an exploit is detected, it saves the stack content and triggers a segmentation fault. The resulting core dump has the necessary information to debug the exploit and fix the software.

GNUe Common Library: GNUe Common Library is the basis for the GNUe tools, such as Forms, Reports, Application Server, and Designer. It implements a database-abstraction layer that provides support for most major databases. A builtin XML-to-Object parser and Object-to-XML marshaller are used by Forms, Reports, and Designer to save and read Forms/Report definitions to and from an XML file. It also defines and implements an RPC abstraction layer that will allow server processes to define their public methods once and have them available XML-RPC and Pyro clients.

GNUe Forms: GNUe Forms is a generator for data aware user interfaces with support for different platforms and data sources. From an XML file containing both the layout definition and the program logic required, GNUe Forms generates native interactive data entry screens for a number of user interface frameworks, including GNOME, KDE, and a curses based text interface. GNUe Forms can interact with all data sources supported by GNUe Common, which includes GNUe AppServer, SQLite, MySQL, Firebird, PostgreSQL, MaxDB, or plain CSV files.

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