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]

A glibc clone for windows.

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]

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 sy...

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]

A portable library for all kinds of date and time calculations, provides auto-analyzing date and time parsers.

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]

C library for Media Analysis, Motion Analizing, Movie Architecture, and Media Authoring. [Open source, LGPL]

Portable high-speed lossless data compression library written in ANSI C.

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.