...-installer (Joomla supported):
http://ucq.me
After single 2-minute-long installation your Joomla website will have social features likes, friends, groups, blogs, messaging, activity stream, market, events and much more.
Wiki:
http://en.wiki.gra4.com/Category:Webmaster_guide
Before you install this Joomla Extension, please make sure you are installing the newest version:
http://gra4.com/file/group/96/all
For the older Joomla! versions look for Extension v.0.0.1.0