IntelliFolks Enterprise Social Networking Server
IntelliFolks is a free Enterprise Social Networking Server. IntelliFolks enriches any intranet with a social network including customizable people profiles, people and expert finder, interactive organization charts, collective intelligence communities, blogs, faceted information discovery, social bookmarking & tagging. User and permission management could be integrated with existing ActiveDirectory or LDAP servers. The embedded portal engine provides customizable page layouts and RSS news feed integration.