Ringside Social Application Server
http://www.ringsidenetworks.com/products/
This is an open-source platform that allows you to build social applications that are integrated with your own site and your facebook application.. It will also eventually be integrated with Open Social.
The really cool thing about it is that developers can create API’s and markup tags (like the Facebook Markup Language) for their own applications. This means that that applications will be able to communicate with each other as well.
Three key points are:
1) Developers can develop and test their social applications on their own laptop using the Ringside, and then upload their applications to Facebook for deployment.
2) Facebook applications can run on any website and are not limited to running on Facebook.
3) New social applications can be developed and deployed on both your website and on Facebook simultaneously.
For the nerds among us, here is a high level diagram of the architecture:
