english deutsch
OGo on Debian
http://helms-deep.cable.nu/~rwh/howtos/OpenGroupware-Debian-HOWTO.html
Unofficial Debian install HOWTO.
OGo on Redhat
http://sukka.jct.ac.il/~yedidia/ogo_rh.html
Unofficial RedHat install HOWTO.
OpenGroupware.org
http://www.opengroupware.org/
Project background, mission, license and download page. Including some screenshots, FAQ and documentation.