The Google Fusion Tables Objective-C SDK by Google helps to access the JSON APIs. It is recommended to use iOS 3 or later and Mac OS X 10.5 and later. Contents include introduction and example applications. Support available in Google discussion group at https://groups.google.com/forum/#!forum/google-api-objectivec-client
Nulab, a communication and collaboration applications company based in Japan, has announced the launch of the new Cacoo SDK edition which includes the brand new Cacoo SDK Edition API. Cacoo is a web-based collaborative drawing tool that allows users to create a variety of diagrams including sitemap, flowchart, mind map, wireframe, UML and network diagrams.