One Time Secret - a message service that allows you send sensitive message to somebody, only for once view, after that it will be deleted.
Mugeda - a web based application that lets you create HTML5 animation in cloud. Very interesting, but it seems a little bit difficult to me.
Insynchq - offers a small client that syncs your Google Docs to all your devices. Supports Windows, Mac now, Linux will be soon.
Mentormob - a new "how to" platform that allows learners and experts learn or teach something.