Recently, blogging service Posterous thought it would try and help ease the burden of moving from other places on the web to its blogging platform by developing a bunch of migration tools. All of these tools were built on other services' open APIs and designed to go in, grab your content, and republish it through Posterous maintaining as much metadata as possible. Things were fine until photo-hosting service Twitpic caught wind and cut of Posterous' API access.
The Moodstocks API provides image recognition services that developers can integrate into their mobile and web applications. The image recognition API allows developers to add reference images and define them--a process that in turn can be used when identifying objects in images.