OSDE is the Eclipse Plug-in for developing OpenSocial applications.
Normally when you want to develop and test a social application, you
must use an actual SNS(e.g., orkut.com, myspace.com, hi5.com, etc.).
This has many drawbacks--for example, you must make friends for testing
your social application, must find a SNS that supports all the
functions you are testing, and the server hosting the SNS must provide
OSDE is able to provide an individual SNS for you. In this small SNS,
you can make a person's profiles, social graph, groups, and most test
data. These test data will be used in your OpenSocial application. In
addition, OSDE provides views for listing people, appdata, activities,
etc. in your Eclipse IDE. By using these views, you will be able to
control most test data when testing your application.