Web Directory

» Better String Library
   A safe and fast string library. It's buffer overflow and aliasing safe, high performance. The library includes a robust C++ wrapper that uses overloaded operators and rich constructors to make the CBstring struct a natural and powerful string abstraction.
   http://bstring.sourceforge.net/

» Cheap Threads
   Open source C library implementing synchronous multithreading with prioritized scheduling and message passing.
   http://home.swbell.net/mck9/ct/

» Crusher Data Compression Toolkits
   Cross-platform compression libraries. [Open source, Commercial]
   http://www.dcmicro.com/crusher/

» DateLib
   A portable library for all kinds of date and time calculations, provides auto-analyzing date and time parsers.
   http://www.datelib.de/index.shtml.en

» FFTW Home Page
   Fast free C FFT library; includes multi-dimensional, real-complex, and parallel transforms.
   http://www.fftw.org/

» Fingerprint Verification System
   An easy to use library that allows programmers to integrate fingerprint technology into their software without specific know-how. Fast, easy to use, and small; great for embedded systems. [Open source, MPL]
   http://fvs.sourceforge.net/

» Flux
   A library for integrated data storage and indexing, marshalling, transfer and encryption. It also features a slew of utility functions for various purposes. It is written in C, using the GLib paradigm. [Open source]
   http://www.fluxlib.org/

» ForbiSoft
   ForbiSoft DIB Library provides platform independent bitmap loading. ForbiSoft ToolTip Library provides platform independent tooltip display. Target Win32 or Windows CE with the same code. Shipped as source code and will compile with Microsoft eMbedded 3.0
   http://www.forbisoft.com/

» GNU Scientific Library
   A free numerical library for C programmers. [Open source, GPL]
   http://www.gnu.org/software/gsl/

» Gopt
   An ANSI C library, for parsing command line arguments and options according to GNU standards. [Open source, GPL]
   http://gopt.sourceforge.net/

» IRCG
   A library for dispatching messages to huge groups of users over an arbitrary number of separate communication channels in real-time using IRC protocol. [Open source]
   http://schumann.cx/ircg/

» LZO
   Portable high-speed lossless data compression library written in ANSI C.
   http://www.oberhumer.com/opensource/lzo/

» Levenberg-Marquardt non-linear least squares algorithms in C/C++
   Package containing double and single precision flavors of the Levenberg-Marquardt algorithm. Included are versions with analytic and finite difference approximated jacobians. [Open source, GPL]
   http://www.ics.forth.gr/~lourakis/levmar/

» MAlib
   C library for Media Analysis, Motion Analizing, Movie Architecture, and Media Authoring. [Open source, LGPL]
   http://www.malib.net/

» Math a la Carte
   Collections of mathematical software in Fortan and C. Software is free for some uses and can be purchased for others. Much of the software was developed at the Jet Propulsion Laboratory.
   http://mathalacarte.com

» Matrix2D
   A library implements a set of functions allowing to manage bi-dimensional matrix with languages C and C++. Matrix2D includes also several functions of images processing. [Free for personal use]
   http://dev.tplanet.net/Matrix2D/

» MyLibC
   A glibc clone for windows.
   http://mylibc.sourceforge.net/

» Sglib
   A generic library for C. It extensively uses the preprocessor for generic implementation of sorting algorithms on arrays, lists, sorted lists, red-black trees. The library operates on user types and does not depend on a particular memory management system
   http://sglib.sourceforge.net

» Standard Function Library: SFL
   By iMatix Corp., portable function library for C/C++ programs; many years development; written in ANSI C; ports: DOS, OpenVMS, OS/2, most Unix, Windows; full sources and documentation (HTML); given as Open Source software for the benefit of Internet commu
   http://legacy.imatix.com/html/sfl/

» Template2doc
   Library that allow generation of html page using templates. A template contain specific keywords that tell the routines where to insert data. Support insertion of table data.
   http://www.algonet.se/~thunberg/template2doc/

» The Endpoint Library
   Library for winsock applications.Currently only compatible with winsock v1.1.
   http://tangentsoft.net/endpoint/

» The Schrödinger Project
   Project supported by BBC research and development and Fluendo to develop open source libraries for the Dirac video codec. Include developer information and frequently asked questions.
   http://schrodinger.sourceforge.net/

» UniquE RAR File Library
   The URARFileLib is a platform-independent, small and fast static library for decompressing RAR files (RAR archives are created with WinRAR). Full RAR v2.0 file format support of all compression methods, including multimedia compression and encoding.
   http://www.unrarlib.org/

» Vermont Views
   A C programming library for creating cross platform user interfaces across Unix, Linux, Posix, VMS, DOS and Windows.
   http://www.vtsoft.com/vcsproducts/vviews.html

» W3C Sample Code Library
   A general-purpose Web API written in C
   http://www.w3.org/Library/

» WM_MOTIF
   C library allows developers to port code from Windows to Unix or Linux systems. By Software Uno.
   http://softwareuno.com/

» a386
   C programming library providing a virtual i386 running in protected mode.
   http://a386.nocrew.org/

» diet libc
   A small, static libc optimized for small size.
   http://www.fefe.de/dietlibc/

» djblib
   Source-file library derived from the many fine software packages written by D.J. Bernstein; collects files from various packages into a central repository from which code is easy to use in new programs.
   http://www.superscript.com/djblib/intro.html

» jclassinfo
   Information extractor and disassembler for Java classes. Backend code available as a C library. [Open source, GPL]
   http://jclassinfo.sourceforge.net/

» libESMTP
   Library for Posting Electronic Mail: manages posting email using SMTP to a preconfigured MTA. Can be used as part of a Mail User Agent or other program that must post email. Free: GNU LGPL.
   http://www.stafford.uklinux.net/libesmtp/

» libZI
   A portable configuration file API that utilizes XML for data storage and retrieval. libZI provides a typesafe way of serializing configuration data into a file in a manner consistent to XML standards. [Open source, GPL]
   http://libzi.sourceforge.net/

» libsndfile
   A C library for reading and writing files containing sampled sound. Project news, features list, API reference, FAQ, and download. [LGPL]
   http://www.mega-nerd.com/libsndfile/

» libspopc
   A simple pop3 client library to be used by MDAs and/or MUA. one of libspopc's purposes is to help non-network-aware C developers to host easily a pop3 mail client in their programs. However, libspopc provides also a classical socket-level API for those wh
   http://brouits.free.fr/libspopc/

» uClibc
   C library optimized for embedded systems. Free: GNU LGPL.
   http://www.uclibc.org/

» ubiqx
   A free and open source library of simple programming utilities (written in C), including linked lists, AVL and Splay balanced binary trees, a simple caching system, Sparse Arrays. [Open source, LGPL]
   http://ubiqx.org/

» xnprintf() family functions for C/C++
   A small source file for 16/32/64-bit compilers. Provides snprintf() and others. [GPL or modified BSD license]
   http://domainename.com/software/xnprintf.html