OpenSceneGraph Library
http://www.openscenegraph.org/projects/osg
Game Tutorial Using SDL & OSG
http://www.cs.clemson.edu/~malloy/courses/3dgames-2007/tutor/index.html
Download the OSG-2.5.2.zip (which has more plug-ins)
ftp://dis.dankook.ac.kr/OSG/OSG-2.5.2.zip
Download the OSG application, FIELD.zip
ftp://dis.dankook.ac.kr/OSG/FIELD.zip