A work in progress. My favorite iOS resources & tools. You might like to also checkout this similarly awesome post by Ben Scheirman.
I have an iOS question.
Is it down ?
Something's still not working.
Tower 2 - Version Control
Pixelmator - Minor adjustments to graphics
Kaleidoscope - Diff & merge of code
CocoaPods - Resource dependencies in Xcode Projects
Alcatraz - Package Manager for Xcode. Allows you to find & easily install extensions.
Pivotal Tracker - Still can't be beat for effective Agile. Their new UI & features are pretty rad.
Paw - Useful for testing APIs as you're using / designing / learning them.
Charles - Recommended purchase. Invaluable for debugging networking issues.
iExplorer - Allows you to inspect the contents of an iOS device, which can be great for debugging.
Fabric. Can't be beat.