http://www.cs.curtin.edu.au/~holliers
http://www.cis.yale.edu/~ariedels/seal.html
http://www.panix.com/~vision
http://iinet.net.au/~sbrowne/index.html
http://krypton.mankato.msus.edu/~hayden/geek.html
http://www.cis.yale.edu/~ariedels/seal.html
http://www.cs.ubc.ca/spider/edmonds
http://www.pi.net/~bobbink
http://www.aone.net.au/undercover