OStatic

Elgg is an open, flexible social application engine, designed to run at the heart of any socially-aware application. Building on Elgg is easy, and bec...

Project SocialSite provides widgets and web services that make it easy for you to add social networking features to your existing web sites.

Bitrix Site Manager ﾖ a comprehensive content management suite for maintaining web sites. This is a web content management system that provides sta...

EchoWaves.com is an opensource group chat social network.

IM + Email + Social Networking Instant Messaging: digsby is a multiprotocol IM client that lets you chat with all your friends on AIM, MSN, Yahoo, I...

With new social networks launching everyday most start with the same basic features. Bloggers have wordpress, mephisto, typo and other open source sol...

Shindig is a new project in the Apache Software Foundation incubator and is an open source implementation of the OpenSocial specification and gadgets...

fbOpen - The Facebook Platform is a standards-based web service with methods for accessing and contributing Facebook data. The Facebook Platform, l...

(from their website) Key features of Knowledge Networks are: ? Knowledge Networks is built in Java. In addition to the robustness of this programming...