The Sphero Unity SDK by Sphero works as a plugin to control a robot to roll around, change colors, and run programs. It includes C# classes, commands, and data callbacks. This plugin interacts with iOS and Android. To join the community, visit http://community.gosphero.com/
iKnow, a social learning site launched last month by Japanese company Carego, have launched an API (our iKnow profile) to allow third parties to "add a little Learning and Linguistic magic to [their] applications, widgets and other mashups." iKnow allows users to take virtual English and Japanese language lessons (other languages are promised for the future) and guides and tracks their progress. Through the social component users can share their progress with friends, leave comments, keep journals, and compete for rankings.