http://www.joomworld.com/joomla-extensions/facewall/overview FaceWall | Create Your Own Small Facebook on Joomla
Now everybody can communicate easily, share everything to people, friends, almost done with ajax technology!
FaceWall features:
+ Real time posting system.
+ Connect to your friends via friend system.
+ Privacy for posts as everybody, friends only, or friends of friends.
+ Posts messags, comments, private messages, share photos, videos, links, documents, songs to people and friends.
+ See what your friends or people are doing in the new feeds.
+ Manage and promote your ads with ads system.
+ and much more!
Note: if you installed Jomsocial and Community Builder on your site. Don't worry! We have already 3 verions for your choice:
+ FaceWall for joomla standalone(The Joomla site is not included CB or Jomsocial).
+ FaceWall for CB component.
+ FaceWall for Jomsocial component.