Cross-platform C++ library for use as a default application framework.
Object Oriented tools for C
Lightweight C++11 library for embedding Unicode
scriptable game engine with built-in support for 2D graphics and sound
Switchtrack is a PHP framework for quickly building web services
Smart Micro PHP Framework inspired by Sinatra in Ruby but not a clone
Networking/Socket C++ Library.
Broadleaf Commerce is an open source Java eCommerce platform.