1)   Social Submitter 2.7.3
Automatic submission of tagged articles with back links to up to 450 social bookmarking sites

 2)   PG Community Software 2008
PG Community Software for your Social Network. Multi-Admin system! SMS payments, Currency converter, Chats, IM, Banners, Galleries, Multilanguage, Classifieds, Linked profiles, Account, Friends lists. Support. Hosting. Customization. Updates

 3)   cyn.in 2.1
Open source group collaboration software for Enterprise. Cyn.in helps teams to build collaborative knowledge by sharing & discussing various forms of digital content within a secure, unified application that is accessible using a web based interface.