Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Diaspora - The online social world where you are in control.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.
Friendica - Decentralisation - Privacy - Interoperability