A set of cross-platform C++ development components complete with documentation, source code and support. The set of four SourcePro components are: SourcePro Core, SourcePro DB, SourcePro Net, and SourcePro Analysis.

Library of Efficient Data types and Algorithms. Has all relevant algorithm building blocks in easy-to-use, efficient form for objects such as graphs, sequences, dictionaries, trees, points, flows, matchings, segments, shortest paths. [Algorithmic Solu...

A portable, cross-platform C++ library designed to add various kinds of word processing (rich text) or text editing capabilities to your application.

A crypto library that provides a wide variety of cryptographic algorithms, formats, and protocols. [Open Source, BSD]

Provides freely available STL-like extensions, including STL-style wrappers for common operating system and framework APIs (such as Windows, Unix, COM, MFC, ATL).

A framework offering portable support for threading, sockets, file access, deamons, persistance, and system for clarity, services. [Open Source, GPL]

A C++ toolkit providing a complete set of fundamental classes for building applications for Windows/MacOSX/Linux. It covers GUIs, containers, audio, midi, XML, vector graphics, file/network handling. [Open source, GPL or commercial license]

A Macintosh optimized C++ source library. It include std::valarray optimized for the Altivec execution engine; std::vector partially specialized on the Mach allocator, for OS-level copy-on-write; a convenient and efficient wrapper for Altivec data typ...

An implementation of the C++ standard template library STL for external memory (out-of-core) computations, containers and algorithms that can process huge volumes of data that only fit on disks. [Open source, GPL]

Listing with descriptions of a large number of C++ libraries, both commercial and free.