A general C++ class library/framework. [Open Source, LGPL]

Provides higher-order polymorphic functions in the C++ language.

Generic application framework suitable for constructing general purpose applications, distributed systems and web based services.

General purpose, generic C++ library for graph data structures and graph algorithms.

A collection of platform-independent C++ class libraries that provides a five-layer framework containing an Object Library, IO and Timers, Threads, Inter-Process Communication, and Distributed Object Communication.

A cross-platform C++ library providing high-performance and portable classes for multi-threading, I/O, networking, Unicode and XML parsing. [Commercial]

An implementation of the C++ Standard Library. [Open Source]

Library designed to simplify writing distributed programs. Instead of attempting to hide asynchronous behavior behind a synchronous facade, it attempts to make it easier to write programs that deal with asynchronous behavior.

A completely portable C++ library, to provide a standard set of classes similar to Java Common API. [Open Source, LGPL]

Includes base class components, collections, I/O classes, network and Internet classes, object database support, and thread library.