Apple has released ResearchKit, an open source framework designed to facilitate design and development of apps primarily involving medical studies.
Peter Steinberger offers a solid introduction and shares his own observations of the new framework.
Custom transition between viewcontrollers holding tableviews. Each cell is animated to simulate a ‘wave effect’ – @theandreamazz
Introducing Pop, the animation engine behind Paper – @fbOpenSource
Built atop AFNetworking, it rips through JSON asynchronously to give you ready-to-use Instagram model objects – @bhatthead
Collection of iOS open source UI controls – @soffes
I previously introduced ReactiveCocoa. If you are looking for a good introduction, Ray Wenderlich has a two part tutorial that may be of interest. ReactiveCocoa Part 1 and Part 2
For the uninitiated:
ReactiveCocoa is an Objective-C framework that provides APIs for composing and transforming streams of values. By chaining, combining, and reacting to signals, software can be written declaratively, without the need for code that continually observes and updates values.
Ross Gibson is the author of TTCounterLabel:
A custom UILabel that acts as a time counter, counting up or down and formatting the string to hours, minutes, seconds and milliseconds. Designed to accept a value in milliseconds that is then displayed it in a time friendly format.