Most notably gDEBugger. After countless hours debugging and tracing through graphics code and wondering what was wrong, I cracked this open, figured out how to use it intelligently, and knocked out a hair-pull-inducing bug in a couple hours.

It was a bit irritating that I couldn’t use all its features since I could only get my hands on a trial version; I had to devise clever hackery to get at the information I needed. If I recall, it was already an expensive tool, but now you are completely unable to purchase it until the creators revise their pricing model. As far as poor marketing strategies goes, that’s uncanny.

Still a good tool. And it works easily on the iPhone/iPad (simulator & device).

You would not believe the hack I just put into this code.