Great for: team collaboration, private/public sports enthusiasts, friends and family
A powerful open source social networking engine
http://www.elgg.org/
Elgg's open source framework provides the core components you need to start building your own social environment, including:
- Powerful Data Model
Elgg provides a powerful data model making the creation of different entities simple, yet flexible.
- Activity Streams
The granular activity stream API ensures your plugins can push the required content to your users.
- Plugin API
Use Elgg's powerful plugin API to build and add your required features.
- User Management
Elgg handles your user management and relationship requirements.
- Access controls
All objects in Elgg can have an access control level applied making granular access permissions possible.
- Web Services API
Expose functionality through the REST API by building a plugin and then either publish the API for other developers to build clients or provide your own.