Star print queue and persistence for iOS and Mac
OpenVBX is a web-based open source phone system for business.
WillCall iOS Physics Etc.
A Ruby wrapper for the Urban Airship API.
A drop in replacement for UINavigationController and/or UITabBarC ontroller on the iPhone that allows custom transition animations
Facebook SDK for iOS
Opscode Chef Cookbook Development Repository
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.