OpenGroupware.org Project background, mission, license and download page. Including some screenshots, FAQ and documentation. http://www.opengroupware.org/

OGo on Debian Unofficial Debian install HOWTO. http://helms-deep.cable.nu/~rwh/howtos/OpenGroupware-Debian-HOWTO.html

OGo on Redhat Unofficial RedHat install HOWTO. http://sukka.jct.ac.il/~yedidia/ogo_rh.html

History Flow Visualizations of evolving, collaboratively edited Wiki pages. http://researchweb.watson.ibm.com/history/