MindMeld Android SDK site shows interface summary with respective interfaces and descriptions along with class summary with corresponding classes and descriptions. The majority of API calls and requests can be made from the MMApp class. Specific functionality is contained in the other model classes. Developers can find guides, parameters, and sample codes in the site. The YouTube video, "Getting Started With the MindMeld Android SDK" displays instructions to install the kit.
Kooaba offers image recognition through its Kooaba API, allowing you to compile metadata on objects in your photos. This can be used for product recognition and pricing, but could also be used to augment personal photo collections, which can be so large that they are nearly impossible to search by hand. There are tons of use cases for image recognition and this API should really open up the field and bring more applications to market.