WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice
A video game with a mixture of 2D, 3D graphics, but mostly 2D. Currently in the planning phase. Database oriented, with multiplayer gameplay intended. Also with an underlying translation framework for Hindi and Japanese.
Vrtra3D is an open source scene-graph library and tool kits for Windows/Xbox360 by C++ and C#. This project provides DirectX adapter library like XNA and high-level scene-graph library on it (or XNA).