- People and Friends : people and relationship information
- Activities : publishing and accessing user activity information
- Persistence (simple key-value pair data for server-free stateful applications
OpenSocial is currently in alpha development, version 0.8 was released on May 28, 2008. Applications implementing the OpenSocial APIs will be interoperable with any social network system that supports them. OpenSocial is rumored to be part of a larger social networking initiative by Google code-named “Maka-Maka”. An Apache incubator open source project, Shindig, was launched in December, 2007, to provide a reference implementation of the OpenSocial standards.