JavaForce
Java Library that adds OpenGL, FFMPEG and WebCamera support. Includes many apps such as jPhoneLite, etc.

jfCraft
Minecraft clone built with JavaForce.

DigiForce
C++ Library includes GUI, threads, sockets and is cross-platform (Windows, Linux)

Q Library
ASM Library for 32bit Protected Mode development in MS-DOS (the good old days)

SourceForge Profile
SourceForge Profile (complete list of hosted projects)