I found this list recently and thought it might be helpful to keep around for reference. Having open source applications available means that you can learn quite a bit from the successes of others by looking at the source and seeing how they accomplished their tasks.
It can be tough to learn how to develop, especially when it comes to finding complete examples. That’s why I put this list together. Each of these open source iPhone apps is not just open source, but has been in the app store, and all but one are in there right now. So if you’re looking for an example of some real apps here they are.