A cross-platform game library based on XNA, but written in C++
Now maintained at https://code.google.com/p/lpi/
A simple C++11 network server framework
Dynamic Python binding for Qt Applications
one server framework
WebKit for OS X Leopard
C preprocessor magick
Middleware for distributed applications
A Directive-Based Heterogeneous Parallel Programming Framework
A C++/Qt ZIP library
C++ framework for robot kinematics, dynamics, motion planning, control
C++ unit testing framework
Crow is very fast and easy to use C++ micro web framework