The original system was written by cookie. It was then completely rewritten and enhanced by msquare (maintainer), MyIgel, mortzu, jplitza and gnomus.
Please look at the contributor list on github for a more complete version.
Webspace, development platform and domain on engelsystem.de is currently provided by would you buy this? (ichdasich) and adminstrated by mortzu, derf and ichdasich.
Many thanks for the german translation: e7p