It seems that the lack of interface customisation with UIPageControl finally got to Jerry Jones and prompted him to create this much more customisable version. It is API compatible so it should be simple to drop in if you are looking for some more visual options for your rows of dots.
This super clean class from Eloy Durán provides a great way to quickly render out tinted assets (with caching) from either PNG or PDF source files.
If there is one area that we could all improve on in our apps it probably be error handling. This post by James Beith of Realmac Software explains the idea behind their newly open sourced block based error recovery code.
This Passbook tutorial from Jonathan Tang gives a nice step by step walk through of all of the different steps for getting an app Passbook enabled including everything you need to do in iTunes Connect as well.
If you are new to Objective-C and just getting started with threading you may have wondered what the @synchronized keyword was for? Steve Vlaminck published a overview of the essentials to get you started.