The Gmail Objective-C SDK written by Google provides access to the JSON API considering Apple application development. It is compatible with iOS 3+ and Mac OS X 10.5+. Along with the access to the Gmail API, the Objective-C library can also interact with the AdSense, Blogger, Calendar, Drive, and Fitness Google APIs.
Singly has announced the open beta of its app connection platform. The platform consists of two main components (i.e. the App Fabric SDK and the Data Fabric infrastructure). The App Fabric simplifies social data sharing and shortens time to enable functionality such as friend finding and login across multiple apps. The Data Fabric allows developers to integrate features like synching, data querying, intelligent indexing, instant push, archiving, and more.
Viadeo, a social network founded in 2004 with 35 million professional members worldwide, is looking to take on LinkedIn as the preferred business social network in the United States -- and the company thinks that its Viadeo API will do it. Viadeo recently launched a publicly available version of its API that provides full access to the social network's users' data including career, news, groups, jobs, schools and a users status and messaging system.