A C and C++ Library + a compiler to create Adobe Flash SWF movies up to version 9 (v1.8.1). Supports nearly all the tags, includes an ActionScript compiler. Detailed docs and other tools: convert fonts to Flash, decompile Flash, jpg2swf. LASTEST IS 1.8.4
Terrain Voyager Engine is an OpenGL accelerated, multi-platform (Win32, Linux, IRIX) landscape engine. One of the goal of it is to make a small FPS game.