drawing by Chad McCail, 1998
Information on SVS is available at:
http://www.spring-alpha.org/svs
The source code is hosted at Savannah:
https://savannah.nongnu.org/projects/socversys/
Other Free Software tools and libraries used in the making of spring_alpha include:
Blender - 3D modeling tool
Soya - 3D graphics engine
Pure Data - audio synthesis system
Audacity - audio editing tool
FontForge - font design tool
Inkscape - vector graphics drawing tool
the GIMP - bitmap graphics drawing tool
For more information about Free Software see:
Free Software Foundation