A cross-platform GUI library
wxWidgets is a C++ library that lets developers create applications for Windows, Mac OS X, Linux and other platforms with a single code base. It has popular language bindings for Python, Perl, Ruby and many other languages, and unlike other cross-platform toolkits, wxWidgets gives applications a truly native look and feel because it uses the platform's native API rather than emulating the GUI. It's also extensive, free, open-source and mature.
Colorer provides source text syntax highlighting services. It colorizes source codes in editor systems (more than 200 syntaxes). Uses powerful HRC format(XML, RE, context free grammas), allowing to support any language. Available as Eclipse plugin.
This is an actor-based framework for C++. Actors are light-weight objects, and they interact fully asynchronously with messages. It’s intended for multi-core processors only and doesn’t have any network routines.
This project is intended to serve as a framework for developing plugin system with internal hierarchical storage of objects coming from plugins. Plugins contains objects and commands. All functionality of kernel and plugins are to be exported to Python.
Third Party Solution for Qt library (http://trolltech.com) Project of prog.org forum (http://prog.org.ru/forum/forum_14.html)
Core library for multiplatform Application Development Framework used in various projects: Vehicle monitoring, SMS sender application and others. Includes builtin features like XML, scripting, translation, etc.
UTL - Universal Template Library UTL::PTL - Patterns Template Library This is a library that implements the design patterns in generic overview.
libsnio - with the help of this library of TCP and UDP functionality can be added to any program, quickly and easily.
Eat another Qt unit test framework, and gui developer toolkit.
SIGMA (SImple Game MAchine) Framework - scalable platform for multimedia applications development.