[[Interface::library]]

Gnustep: Provides an object oriented application development framework and tool set for use on a wide variety of platforms. It provides a generalized visual interface design and a cohesive user interface. It also uses a common imaging model called Display PostScript (based on PostScript) to do all its drawing, so the program is truly WYSIWYG. GNUstep is written in the Objective-C language, a simple yet powerful object-oriented language based on C that gives you the full power of an object-oriented language with exactly one syntax addition to C and a dozen or so additional keywords.

Gnustep-back ,: This is the back-end component for the GNUstep GUI Library. GNUstep is a cross-platform, object-oriented set of frameworks for desktop application development. The set of frameworks, based on Cocoa (previously OpenStep), enables developers to rapidly build sophisticated software by employing a large library of reusable software components. This GUI uses an abstraction layer to talk to the windowing system. It uses the GNUstep back library to handle all of the windowing-system-specific details. It currently works via a DPS emulation engine to emulate the DPS functions required by the front-end system. More recently, a back end based on Cairo was implemented. This is a high-performance 2D graphics library supporting vector and composing operations. Another back-end runs on top of the X Window System and uses only Xlib calls for graphics, but seems deprecated. (There is also a back end supporting the Windows GDI, allowing GNUstep applications to run on Windows)

Gnustep-base: The GNUstep Base Library is a library of general-purpose, non-graphical Objective C objects. For example, it includes classes for strings, object collections, byte streams, typed coders, invocations, notifications, notification dispatchers, moments in time, network ports, remote object messaging support (distributed objects), and event loops. It provides functionality that aims to implement the non-graphical portion of the Apple's Cocoa frameworks (the Foundation library) which came from the OpenStep standard.

Gnustep-gui: The GNUstep GUI Library is an object-oriented application programming interface (API) for writing graphical applications. These classes include graphical objects such as buttons, text fields, popup lists, browser lists, and windows; there are also many associated classes for handling events, colors, fonts, pasteboards and images. It is based on Cocoa (previously OpenStep). The library calls methods of the display server, while gnustep-back translates those calls to native calls of the operating system.

Gnutls ,: GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base GNU/Linux libraries. A back-end designed to work and be secure out of the box, keeping the TLS and PKI complexity outside the applications.

Go: go is a small shell command for changing directories quickly. Typically you have a set of directories that you work in. Typing out the names of those dirs in full can be tedious.

Goblin Graph Library: The GOBLIN project consists of a C++ class library for a large series of graph optimization problems, GOSH, an extension of the Tcl/Tk scripting language to graph objects, and GOBLET, a graphical user interface to the library functions. GOBLET includes a graph editor, but provides only basic graph layout methods.

Goffice: GOffice is a GObject based C library. It provides easy API access to creating and manipulating graphs and canvases. It also includes a number of utilities and widgets that might be useful in office productivity software and similar. The GOffice code was originally a part of Gnumeric, but was split into a separate library in 2005. Today it is being used by projects such as Gnumeric, Gnucash, Abiword (optional), GChemUtils and more.

Google-adwords-dumper: google-adwords-dumper is a program to fetch basic data of an adwords account and some relevant performance reports of the account. It also fetches the data of child accounts if the given account is a master account.

Grace Library: This is a candidate for deletion: Links broken. Email to maintainer broken. Poppy-one (talk) 14:34, 2 August 2018 (EDT) Grace is a C++ library/enhancement for creating multithreaded server applications. It delivers basic building blocks for stable, readable code and makes it easy to exchange data with other systems.

Grapefruit

GrapeFruit is a pure Python module that let you easily manipulate and convert color information. Its Primary goal is to be natural and flexible. The following color systems are supported by GrapeFruit:

RGB (sRGB)
HSL
HSV
YIQ
YUV
CIE-XYZ
CIE-LAB (with the illuminant you want)
CMY
CMYK
HTML/CSS color definition (#RRGGBB, #RGB or the X11 color name)
RYB (artistic color wheel)

Graphics3D: 'Graphics3D' is a C++ library for game developers, researchers, and students. It is a base of robust and high performance code common to most 3D projects. It is not a standalone graphics or game engine--it is a set of pieces to jumpstart your own engine or graphics project. The library has two parts: G3D for pure math, and GLG3D for interacting with hardware acceleration via OpenGL. You can use G3D without GLG3D if you want to use another 3D API or don't like the OpenGL abstraction.

Gretl: Gretl, an acronym for Gnu Regression Econometrics and Time-series Library, is a package for performing statistical computations for econometrics. It consists of both a command-line client and a graphical client. It features a variety of estimators such as least-squares and maximum likelihood; several time series methods such as ARIMA and GARCH; limited dependent variables such as logit, probit and tobit; and a powerful scripting language. It can output models as LaTeX files. It also may be linked to GNU R and GNU Octave for further data analysis.

Groupserver: GroupsServer is a server package for hosting mailing lists, like GNU Mailman, or Sympa. But like Discourse and Loomio, is also has a feature rich web interface, allowing each mailing list it hosts to also be used as if it were a web forum. In keeping with its name GroupServer refers to each mailing list forum as a 'group'. Users can send, receive, read, and reply, to group messages by email, or they can read and post to the group from the web interface. Group admins can manage and moderate their groups using email commands, as in older mailing list packages, or using the web interface. A single GroupServer instance can host multiple organisations, each with multiple groups.

Gsasl: GNU SASL an implementation of the Simple Authentication and Security Layer (SASL) framework, consisting of a library with several plugins, command-line application, test-suite, documentation and source code usage examples. GNU SASL consists of a library (`libgsasl'), a command line utility (`gsasl') to access the library from the shell, and a manual. The library includes support for the framework (with authentication functions and application data privacy and integrity functions) and at least partial support for the CRAM-MD5, EXTERNAL, GSSAPI, ANONYMOUS, PLAIN, SECURID, DIGEST-MD5, SCRAM-SHA-1, SCRAM-SHA-1-PLUS, LOGIN, and NTLM mechanisms.

Gscope: A Software Oscilloscope Library: Gscope is a software oscilloscope library build using the GTK and GNOME toolkits. Gscope can be used to monitor, display and debug various types of "real-time" data. Additionally, the scope can be used for graphing file data that is in a tuple format.

Gsl: The GNU Scientific Library is a library for numerical analysis in C and C++. It includes a wide range of mathematical routines, with over 1000 functions in total. Subject areas covered by the library include: differential equations, linear algebra, Fast Fourier Transforms and random numbers.

Gss: GNU Generic Security Service Library implements the GSS-API framework and a Kerberos V5 mechanism (through Shishi). GSS-API and Kerberos V5 is used by network clients and servers to perform authentication, often using the SSH protocol for remote access or SMTP/IMAP/POP3 for email. This package contains also a command line tool for GSS.

Gstreamer: GStreamer is a library for constructing graphs of media-handling components. The applications it supports range from simple Ogg/Vorbis playback, audio/video streaming to complex audio mixing and video non-linear editing. Applications can take advantage of advances in codec and filter technology transparently. Developers can add new codecs and filters by writing a simple plugin with a clean, generic interface. This package provides the core library and elements.

Gtk+: GTK+ is a GUI Toolkit for creating graphical user interfaces. This package provides a complete set of widgets suitable for projects ranging from small one-off tools to complete application suites. In addition to basic widgets, such as buttons, check boxes, and text entries, it also provides Model-View-Controller (MVC) APIs for tree views, multi-line text fields, and menu and toolbar actions. GTK+ is the primary library used to construct user interfaces in GNOME. Its name stands for "GIMP Tool Kit", as originally it was explicitly written for that image manipulation program, and later extracted from it as a stand-alone library. Third-party language bindings designed for the GNU system are provided by the Guile-Gnome project.

Gtk2Hs: 'Gtk2Hs' is a GUI library for Haskell based on Gtk. It features automatic memory management, Unicode support, and bindings for the Mozilla browser rendering engine. It also includes bindings for several Gnome modules: libglade, for loading GUIs from xml files at run-time, so you can design an interface visually using the Glade user interface builder; GConf, for storing application preferences; and SourceView, a source code editor widget with syntax highlighting.

GtkHTML: GtkHTML is a HTML rendering/editing library. It is not designed to be the ultimate HTML browser/editor; instead, it is designed to be easily embedded into applications that require lightweight HTML functionality.

Guile-gcrypt: Guile-Gcrypt is a cryptography library for Guile using Libgcrypt. The API provides a Guile 2.x interface to a subset of the GNU Libgcrypt crytographic library, which is itself used by the GNU Privacy Guard (GPG).

Guile-git: This package provides Guile bindings to libgit2, a library to manipulate repositories of the Git version control system.

Guile-json

Guile-JSON is a JSON module for Guile. It supports parsing and building JSON documents according to the http://json.org specification. These are the main features:

Strictly complies to JSON specification.
Build JSON documents programmatically via macros.
Unicode support for strings.
Allows JSON pretty printing.

Guile-xcb: Guile XCB is an X11 client library written entirely in Guile. It makes use of the Guile compiler and virtual machine to turn XML descriptions of the X protocol provided by the XCB project into Guile object code files. Support is included for the core X protocol and twenty-seven extensions. Guile XCB also includes some simple code for running asynchronous event loops.

Gwenhywfar: 'Gwenhywfar' is a multi-purpose library that provides useful functions such as configuration file handling, a full featured message generation and parsing engine, and an operating system abstraction layer. It is used by Libchipcard, OpenHBCI, AqMoney, and various other projects.

HCluster

A hierarchical clustering package for Scipy. This library provides Python functions for hierarchical clustering. Its features include:

generating hierarchical clusters from distance matrices
computing distance matrices from observation vectors
computing statistics on clusters
cutting linkages to generate flat clusters
and visualizing clusters with dendrograms.

HPAlib: The HPA library offers functions for high precision arithmetic, a high precision math library and functions which apply high precision computation. The math library support includes evaluation of trigonometric, inverse trigonometric, hyperbolic, inverse hyperbolic, logarithm and exponential functions at the same precision as the floating point math itself. The version 1.0 of the HPA library supports high precision complex arithmetic and includes an extended precision complex math library.

HTML Defaultify: 'Defaultify' lets you populate any HTML form with default values that you specify-- it parses the HTML to find the tags representing form fields, and alters those tags so that the desired initial values will be set. It's useful for letting a user correct input errors, presenting a form to edit an existing database record (or user account information), maintaining a query form from one results page to the next, etc. HTML::Defaultify lets you completely separate the HTML from the program code, which means a non-technical designer can work on the HTML while a programmer works on the code. Also, it uses existing HTML, so you needn't rewrite old pages in a new format.

HTML Mason: HTML::Mason is a web site development and delivery system that constructs web pages and sites from shared, reusable building blocks called components. Components contain a mix of Perl and HTML, and can call each other and pass values back and forth like subroutines. They increase modularity and eliminate repetitive work. HTML::Mason is most powerful when used in conjunction with mod_perl, but can be used in standalone applications as well.

HTTPlib2: A comprehensive HTTP client library, httplib2 supports many features left out of other HTTP libraries.

Hachoir project- hachoir core

Hachoir is the french name for a mincer: a tool used by butchers to cut meat. Hachoir is also a tool written for hackers to cut a file or any binary stream. A file is split in a tree of fields where the smallest field can be just a bit. There are various field types: integer, string, bits, padding, sub file, etc. Hachoir has many interesting features:

Autofix: Hachoir is able to open invalid / truncated files
Lazy: Open a file is very fast since no information is read from file, data are read and/or computed when the user ask for it
Types: Hachoir has many predefined field types (integer, bit, string, etc.) and supports string with charset (ISO-8859-1, UTF-8, UTF-16, ...)
Addresses and sizes are stored in bit, so flags are stored as classic fields
Endian: You have to set endian once, and then number are converted in the right endian
Editor: Using Hachoir representation of data, you can edit, insert, remove data and then save in a new file.
Website: http://hachoir.org/wiki/hachoir-core

Hachoir project- hachoir regex: hachoir-regex is a Python library for regular expression (regex or regexp) manupulation. You can use a b (or) and a+b (and) operators. Expressions are optimized during the construction: merge ranges, simplify repetitions, etc. It also contains a class for pattern matching allowing you to search multiple strings and regex at the same time.

Hachoir project- hachoir subfile: hachoir-subfile is a tool based on hachoir-parser to find subfiles in any binary stream. It searches images, videos, SWF files, and all sub files in a drive.

Ham Radio Control Libraries: The HAM radio equipment control libraries allow you to write amateur radio equipment control programs for transceivers which use CAT or similar computer interfaces for control.

HapCluster++: HapCluster++ is a software package for linkage disequilibrium mapping using coalescent theory. It is based on a Bayesian Markov-chain Monte Carlo (MCMC) method for fine-scale linkage-disequilibrium gene mapping using high-density marker maps. HapCluster++ is a C++ implementation of the method described in the paper "Fine Mapping of Disease Genes via Haplotype Clustering" by E.R.B. Waldron, J.C. Whitaker, and D.J. Balding. Genetic Epidemiology. 30: 170Ãâ179. (2006).

Harminv: Harminv is a program (and accompanying library) to solve the problem of harmonic inversion. Given a discrete-time, finite-length signal that consists of a sum of finitely-many sinusoids (possibly exponentially decaying) in a given bandwidth, it determines the frequencies, decay constants, amplitudes, and phases of those sinusoids. Harminv can, in principle, provide much better accuracy than straightforwardly extracting FFT peaks because it assumes a specific form for the signal. (Fourier transforms, in contrast, attempt to represent *any* data as a sum of sinusoidal components.) It is also often more robust than directly least-squares fitting the data (which can have problematic convergence). Harminv employs the "filter diagonalization method" (FDM) of Mandelshtam and Taylor.

Hasard: This is a candidate for deletion: Links broken. Email to maintainer broken. Poppy-one (talk) 15:09, 2 August 2018 (EDT) Hasard is a pseudo-random random number generator (PRNG) library. It includes multiple engines (algorithms), examples: Park-Miller, Mersenne Twister and GNU/Linux built-in random PRNG. It has simple API but with strong code, eg. PRNG seed can be generated using strong entropy (hardware random number generator like /dev/random on GNU/Linux). The library is written in C and a Python binding is available. "Hasard" is the french word for "randomness".

Hashit: Hashit is a library of generic hash tables that supports different collision handling methods with one common interface. Both data and keys can be of any data type. It is small and easy to use.

Hfloat: The Huge-float package is for computations with very long (huge!) floating point numbers. With hfloat you can compute pi to several million digits.

Highlight.js

Highlight.js is a syntax highlighter for the Web.

135 languages and 65 styles (live demo)
Automatic language detection
Multi-language code highlighting
Available for Node.js
Works with any markup
Compatible with any JavaScript framework

Hk classes: 'hk_classes' is a set of C++ libraries for rapid development of database applications with all features a modern database application should have, like forms and reports. hk_classes is database and GUI independent. It also includes command line tools to use hk_classes in scripts.

Hoard: Hoard is a fast, scalable and memory-efficient allocator for multiprocessors. It solves the heap contention problem caused when multiple threads call dynamic memory allocation functions like malloc() and free() (or new and delete), and can dramatically improve the performance of multithreaded programs running on multiprocessors. it is a drop-in replacement for malloc(), etc., so you don't have to change your source code.

HotSwap: This is a candidate for deletion: Links broken. Email to maintainer broken. Poppy-one (talk) 16:46, 2 August 2018 (EDT) HotSwap provides a robust library for updating the implementation of an object at runtime (aka hotswapping). This is achieved through recompilation, dynamic class reloading, and object state migration throughout the life of an application. Hotswapping makes Java feel more like an interpreted language than a compiled language; it is fundamentally useful for runtime development of an application (application evolution or incremental development).

Hy: Hy is a Lisp front-end to the Python AST / Bytecode. This allows you to use the Python VM just as Clojure uses the Java VM. Hy is special, since not only can Hy invoke Python, but Python can also interop with Hy in a clean way.

IPStream: 'IPStream' is a C++ crossplatform library for working with TCP/UDP protocols. It is multithreaded and relies on the Boost libraries for this (particularly Boost.Thread It makes working with TCP/UDP easier due to serialization operators usage.

IPlib: A Python module for converting and managing pairs of address/netmask in the CIDR notation. Some example scripts ('ipconv', 'nmconv' and 'cidrinfo') are included.

ISO Master: ISO Master is a graphical editor for ISO images with support for ISO9660, RockRidge, and Joliet file names. It is useful for extracting, deleting, or adding files and directories to or from an ISO image. It is based on the bkisofs and GTK2 libraries.

ISODate: This module implements ISO 8601 date, time and duration parsing. The implementation follows ISO8601:2004 standard, and implements only date/time representations mentioned in the standard. If something is not mentioned there, then it is treated as non existent, and not as an allowed option. For instance, ISO8601:2004 never mentions 2 digit years. So, it is not intended by this module to support 2 digit years. (while it may still be valid as ISO date, because it is not explicitly forbidden.) Another example is, when no time zone information is given for a time, then it should be interpreted as local time, and not UTC. As this module maps ISO 8601 dates/times to standard Python data types, like date, time, datetime and timedelta, it is not possible to convert all possible ISO 8601 dates/times. For instance, dates before 0001-01-01 are not allowed by the Python date and datetime classes.

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