The Twitter Kit for Android, supported by Twitter as part of the Fabric developer suite, helps developers create Android 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 Twitter Kit includes "TwitterCore" for standard login, "TweetUi," for displaying a user's Twitter stream, "TweetComposer," 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.
A brand new iOS messaging/social app called Peach has rocketed in popularity since launching last Friday. A developer has reverse engineered the Peach API and created clients for Swift and Mac. The clients have been posted on GitHub for developers interested in using the undocumented Peach API.