Generic popover implementation for iOS with same API as the UIPopoverController for the iPad, but configurable with custom background and available for iPhone as well.

Smooth & fast line drawing from touch inputs for UIViews using Quartz

Twitter-like cascade UI library

UIKit based Spingboard clone, similar to Three20's TTLauncherView. (Update Aug-9-2011: finally have time to refactor this for iOS5 custom container view controllers)

Reproduces the oft-seen glossy gradient effect

Helper classes to make it easier to perform GET and POST requests in objc