The Twitter Kit for iOS, supported by Twitter as part of the Fabric developer suite, helps developers create iOS applications that integrate various Twitter functionalities. The SDK can be used to implement easy Twitter login, composing tweets, displaying tweets, and authentication all from a 3rd party application. The iOS Twitter Kit includes "Login" for standard login, "Twitter API," for iOS driven API requests, "Tweet Views," for displaying a user's Twitter stream, "Tweet Compose," for composing and posting new tweets, and "Digits," a new way that users can verify with Twitter via their mobile phone number over SMS-based authentication.
App.net, Dalton Caldwell’s proposed ad-free Twitter-alternative, has launched an experimental Developer Incentive Program to financially reward developers that create innovative and popular applications using the App.net API.
Filmaster, a project started by two Polish movie addicts in 2008 has made moves that could catapult them into the big marquee. Filmaster takes it one step further than movie databases like IMDB and movie recommendation engines like Mombo by combining movies and recommendation with a complete community-based social experience. And to support all this, it has a website, mobile applications and a Filmaster API to fuel further adoption.
Free blogging service Posterous is simple to use, but posts several types of content via e-mail or web: video, audio, pictures, and documents. For some users, though, they might prefer more enhancements to the interface, or a mobile app. For them, and the developers that cater to them, there's the newly updated Posterous API. A complete replacement and rewrite to the previous version, this allows a lot more access to developers, including administrative options like adding sites and users.