There are only two which are worth it .
http://www.boonex.com/dolphin almost flawless
http://demo.oxwall.org/index needs a lot of work
Any other thing just did not work
i tried buddy press ( to memory intensive and did not install on many hosting sites or crashed the sites)
joomla ( most are paid , really sad state over there)
drupal (too complicated , the guys who program there just do not understand social )
http://www.boonex.com/dolphin almost flawless
http://demo.oxwall.org/index needs a lot of work
Any other thing just did not work
i tried buddy press ( to memory intensive and did not install on many hosting sites or crashed the sites)
joomla ( most are paid , really sad state over there)
drupal (too complicated , the guys who program there just do not understand social )