Written in Objective-C, Syncano iOS Library is the official iOS client library developed and supported by Syncano to interface with the Syncano API via websockets. The latest version of the library may be downloaded from GitHub. The RESTful API provides programatic access to Syncano's backend-as-a-service that allows app developers to synchronize and scale their data in real time across multiple devices and servers.
As announced on the Flickr Blog, Flickr has launched a new website for developers: Flickr Code. And besides announcing the new site they've both a) given interesting details on just how much API traffic they do each day (see below), and b) they announced they're open sourcing Flickr Uploadr, the cross-platform (Windows and OS X) desktop tool for uploading photos to Flickr.