Interesting notes about search optimization in the App Store
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» iPhone Application Marketing: Reviewing Current Websites :: Positive Space Blog
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Memory Management with Cocoa/WebObjects
A good article on understanding retain counts, etc. in Objective-C.
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Finding iPhone Memory Leaks: A “Leaks” Tool Tutorial
Excellent tutorial on using Leaks to find memory issues in iPhone apps.
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MDNS and caffeine: How I got Bonjour running on my iPhone
Getting Bonjour to run on the iPhone
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XCode templates for iPhone static libraries with unit testing | Coding Ventures
Excellent article on making it easier to set up static libraries for unit testing.
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Wizzley Presto and the Mysterious Time Machine
Very intriguing article on making a pretty decent iPhone game in less than 30 days.
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Interesting iPhone app which animates 3K particles
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eddit: Shop: iPhone UI Icon Set
Great set of iPhone UI icons.