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3DKit The GNU 3DKit is a platform independent rendering architecture based on OpenGL, written in ObjC. It is part of the GNUstep environment, which provides an object-oriented application development framework and tool set. As of July 25, 2002 the sources for the old 0.3.x versions can no longer be downloaded. Please contact the author if you would like the source code for the 0.3.x versions. This project was a GNU package. It has since been decommissioned and is no longer developed.

ADG: Automatic Drawing Generation The ADG library (Automatic Drawing Generation) is a set of functions focused on automating the drawing of mechanical parts. It is not a CAD system but a library providing a non-interactive canvas where you can put common CAD entities such as paths, xatches and quotes, to create your technical drawings.

ADOdb ADOdb is a database abstraction library for PHP. The PHP version currently supports an amazing number of databases, thanks to the wonderful ADOdb community: MySQL, PostgreSQL, Interbase, Firebird, Informix, Oracle, MS SQL, Foxpro, Access, ADO, Sybase, FrontBase, DB2, SAP DB, SQLite, Netezza, LDAP, and generic ODBC, ODBTP. The Sybase, Informix, FrontBase and PostgreSQL, Netezza, LDAP, ODBTP drivers are community contributions. Some reasons why ADOdb is popular include:

• Designed for speed. It is probably the fastest free software database abstraction library available for PHP. See benchmarks.
• Provides extensive portability support such as date and type-handling and portable schema creation. See portable sql tips
• Support many enterprise features such as database backed sessions (with session expiry notification), SQL code generation, pivot tables, SELECT LIMIT emulation for all databases, performance monitoring.
• Easy to learn.
• Extensive QA, every release is unit-tested on Access, MySQL, PostgreSQL, MS SQL, Oracle 9.
• Mature, continuously developed since August 2000. Has a large community of users.
• Powerful Active Record support. See docs.
• Very reasonable licensing terms (BSD). This means that you can incorporate (and even compile) it into your software applications royalty-free without asking the author's permission, provided you include license.txt in your release.

ADOdb Lite A small, fast replacement for ADODB that uses 1/6th of the memory and upto 300% faster while being compatible with ADODB using a subset of the most often used ADODB commands.. Supports Frontbase, MaxDB, MiniSql, MSSQL, MySql, Postgres, SqLite and Sybase.

ADOdb for Python ADOdb is a database abstraction library. ADOdb was originally developed for PHP, and ported to Python. The Python version implements a subset of the PHP version. You might ask why Python needs a database abstraction library when Python provides the official DB API. Unfortunately the DB API does not encapsulate differences in the database implementations. For example, to select a limited number of rows, say 10 rows, you would have to use very different SQL for different databases:

• MS SQL select top 10 from table
• MySQL and PostgreSQL select * from table limit 10
• Oracle select * from (select * from table) where rownum <= 10
• These differences are handled by ADOdb (using SelectLimit), but not by the Python DB API. Other important database differences transparently handled by ADOdb include date-formating, associative arrays (records as dictionaries) and LOB-handling.

ALSA OSS The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the GNU/Linux operating system. ALSA has the following significant features:

• Efficient support for all types of audio interfaces, from consumer sound cards to professional multichannel audio interfaces.
• Fully modularized sound drivers.
• SMP and thread-safe design.
• User space library (alsa-lib) to simplify application programming and provide higher level functionality.
• Support for the older Open Sound System (OSS) API, providing binary compatibility for most OSS programs.

ALSA library The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the GNU/Linux operating system. ALSA has the following significant features:

• Efficient support for all types of audio interfaces, from consumer sound cards to professional multichannel audio interfaces.
• Fully modularized sound drivers.
• SMP and thread-safe design.
• User space library (alsa-lib) to simplify application programming and provide higher level functionality.
• Support for the older Open Sound System (OSS) API, providing binary compatibility for most OSS programs.

APE Tag Libraries C, Clojure, Erlang, Lua, Python, Ruby Libraries for reading/writing APEv2 tags.

ASCEND ASCEND IV is an object-oriented mathematical modeling environment, with similar functionality to programs such as GAMS, AMPL, Aspen, or Dymola. If can be used to solve difficult non-linear systems of equations and to plot dynamic behaviour of such systems. Although ASCEND has primarily been developed by Chemical Engineers, great care has been exercised to assure that it is domain independent. ASCEND can support modeling activities in fields from Architecture to (computational) Zoology.

ATK NOTE:The code for this project has been subsumed into other projects, most notably http://www.gnomefiles.org/app.php/GERvoice 'Accessibility' means enabling people with disabilities to participate in substantial life activities that include work and the use of services, products, and information. GNOME Accessibility is the suite of software services and support in GNOME that lets people with disabilities use all the functionality of the GNOME desktop.

ATLAS ATLAS (Automatically Tuned Linear Algebra Software) is a system for generating high-performance mathematical libraries. It generates a library that is specifically tuned to your processor and compiler. ATLAS's purpose is to provide portably optimal linear algebra software. In particular, ATLAS provides ANSI C and Fortran 77 interfaces to the BLAS, and a subset of LAPACK.

ATM SAR Library (SARLib) SARLib can be used as an AAL5 ATM Segmentation and Reassembly engine.

AVbin AVbin is a thin wrapper around FFmpeg, providing binary compatibility for applications and languages that need it. FFmpeg is a collection of audio and video codecs widely used in projects such as mplayer, xine, gstreamer and VLC. It is under continuous development; so much so that its developers rarely provide a release, and SVN snapshots of the library must be statically linked to avoid version incompatibilities. AVbin allows programs that require dynamic linkage to use FFmpeg. It does this by providing:

• an accurate version number within the shared library, allowing applications to select the appropriate data structures and functions to use at runtime, and
• a simplified interface with an unchanging ABI to the most common decoding functionality within FFmpeg.
• AVbin is distributed as a single dynamic library (.so on GNU/Linux, .dylib on Mac OS X, and .dll on Windows) that depends on no other files or installations. This eliminates the many complexities of building FFmpeg on platforms other than GNU/Linux; however you can still build it from source if you prefer.

Aalib 'Aalib' is a low level gfx library that works on any kind of terminal. It does not require graphics devices (in fact, no graphical output is possible), and is particularly useful for those with older hardware who do not want to worry about overloading their systems with graphical applications.

Aapl Aapl is a C++ template library for generic programming. It contains Linked List, Avl Tree, Vector, Binary Search Table, Double Ended Queue, and Merge Sort. The library is designed to be versatile for the programmer. For example, the linked list utilizes both inheritance and templates to allow a single instance of a data structure to be an element in multiple lists. In general, Aapl data structures do not have private data members and are thus not abstracted away.

Abclock 'abclock' gives a spatial representation of time. It isn't tied to the design of a mechanical clock, but instead uses the natural properties of bitmaps: straight lines and rectangles. The clock uses ordinary hours and minutes. Placement and movement of objects is analogous to mechanical clocks. Time has a symmetrical property that is reflected in the way time changes in this clock. It is clear and exact up to parts of minutes, even when the bitmap is very small.

Achievo ATK Achievo ATK is an object oriented Web-application Framework, written in PHP. It is targeted at developers who wish to focus on business logic, instead of coding HTML. Where other application frameworks mainly provide a large set of utility classes, ATK provides a complete framework that requires only small amounts of code to get usable applications, while maintaining full flexibility. It is currently the back-end software for the 'achievo' project management/project tracking tool.

Ad-hoc Support Library Ad-hoc Support Library (ASL) is a user-space library which provides an API to faciliate implementation of routing protocols for wireless ad-hoc networks in GNU/Linux.

Ada Components A component library for the Ada language. The four main categories are data structures, math, Ada programming tools, and OS interface.

Ada Motif binding library SERC's Ada/Motif is a complete binding to X Windows and OSF/Motif for the Ada programming language it was based in part upon the SAIC/Unisys (STARS) public-domain bindings it incorporates many of the bug fixes and additional capabilities beyond the public-domain releases in Ada/Motif. Most noteworthy are the capabilities included in Ada/Motif for Ada tasking, callback registration, memory leak detection/prevention and capabilities for developing customized widgets. Paramax/STARS considers Ada/Motif to be the commercial version of their STARS bindings, according to SERC.