CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
Drake Shake - Shake to add Drake to any photo
Dashmote - Dashmote bundles stock image providers to make finding stock images as easy as possible.
Myheritage In Color - Myheritage In Color is a best-in-class technological tool that has been designed for colorizing old photos.
WTF is that? - Send any picture and it will tell you what it is!
Drizzy app - The iOS8 keyboard with all the hottest Drake verses