open source technology
- plib -- plib.sourceforge.net
- OpenSceneGraph -- www.openscenegraph.org
- OpenSound -- www.cnmat.berkeley.edu/OpenSoundControl
- ARToolkit -- artoolkit.sourceforge.net
- Mixed Reality Toolkit -- www.cs.ucl.ac.uk/staff/rfreeman
- OpenNap -- opennap.sourceforge.net
- ImageMagick -- www.imagemagick.org
- cygwin -- www.cygwin.com
