The Irrlicht Engine is an open source high performance realtime 3D engine written and usable in C++. It is completely cross-platform, using D3D, OpenGL and its own software renderers.
A maze c# gdi+ game gui with a c# dll backend for all the maze stuff. i'm working now at a c# d3d gui. the backend generates random mazes of up to 3 dimensions (but it can be any number).
Interpreter for Adept V+ language (developed on s650 Viper arm). Planned to include a full VM/emulator for host processor and D3D workspace representation.