A collection of algorithms, containers, iterators, and other fundamental components of every piece of software, implemented as C++ classes, templates, and functions essential for writing C++ programs. The goal is to provide a free implementation of th...

A collaborative effort to develop a robust, easy to use, and efficient C++ software library of geometric data structures and algorithms.

A library providing spell checking. [Open source, LGPL]

Provides a repository for free peer-reviewed portable C++ source libraries. The emphasis is on libraries which work well with the C++ standard library.

Free library of cryptographic schemes: includes ciphers, message authentication codes, one-way hash functions, public-key cryptosystems, and key agreement schemes. [Open Source]

A collection of C++ libraries designed for computer vision research. Includes imaging, geometry, numerics, streaming I/O, basic templates, posix. VXL is written in ANSI/ISO C++ and is designed to be portable over many platforms.

C++ bindings for ORBit.

Implements a full callback system for use in widget libraries, abstract interfaces, and general programming. [LGPL]

A C++ library for importing and exporting WordPerfect documents. Features, screenshots, download and developer information. [LGPL licence]

An open source numerical library for mathematician, engineers and scientists who work in C++. Users can donate or licence (for commercial uses) their own code, request components, or bid to develop requested components.