1. E-commerce site- http://enext.in
  2. Tag Friends App on Orkut, Hi5 and MySpace.
  3. Gadgets i18n tool - http://wiki.opensocial.org/index.php?title=Gadgets_i18n_Tool
  4. http://vtupwn.appspot.com
  5. TwitVerbs- http://twitverbs.appspot.com
  6. http://wordpress.org/extend/plugins/wp-likes

some more random stuff…