FreeImage (Popularity: )
http://freeimage.sourceforge.net/ Open Source library project for developers who would like to support popular graphics image formats like PNG, BMP, JPEG, TIFF.
OpenSG (Popularity: )
http://www.opensg.org Open source portable scenegraph system to create realtime graphics programs. Runs on IRIX, Windows and Linux and based on OpenGL.
Vega Strike (Popularity: )
http://vegastrike.sourceforge.net/ Describes space simulation in which players trade and bounty hunt. Includes features, forum, manual, and downloads of beta versions
MNG (Popularity: )
http://www.libmng.com Is the animation extension to the popular PNG image-format. It brings the ease of GIF animations, WITHOUT the patent licensing ...