Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
Speechyard - Learn English online through movies!
Dashmote - Dashmote bundles stock image providers to make finding stock images as easy as possible.
Lingvo TV - Learn languages while watching movies on Netflix.
Rubric - Generate an instant, cool caption for your photo