Andreas Röver  roever@users.sf.net

Many thanks to

Bill Cuttler,
André van Kamen and
Don E. Knuth for their documents and hints on algorithms

Ronald Kint-Bruynseels for a lot of well organized feedback,
icons, praise and criticism, and the nice new documentation ...

Dic Sonneveld for explaining his burrgrowing ideas to me

Derek Bosch for providing the OSX binary and implementing STL export

Markus Götz for helping with implementing the spheres space grid and
other useful hints

Volker Grabsch for build system and other things