Oliver Kiddle - http://people.freenet.de/opk/
Paul Falstad - http://www.falstad.com/
Peter Stephenson - http://homepage.ntlworld.com/p.w.stephenson/
Richard Coleman
Stephane Chazelas - http://stephane.chazelas.free.fr/
Sven Guckes - http://www.guckes.net/
Oliver Kiddle - http://people.freenet.de/opk/
Paul Falstad - http://www.falstad.com/
Peter Stephenson - http://homepage.ntlworld.com/p.w.stephenson/
Richard Coleman
Stephane Chazelas - http://stephane.chazelas.free.fr/
Sven Guckes - http://www.guckes.net/