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Apple Developer Library -
Apple Development Videos -
Apple WWDC -
Apple WWDC ASCII searchable
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Apple Open Source -
Stanford CS139p Lectures (iTunes) -
Secure Coding Guide
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Cocoa Controls -
Dropbox iOS SDK
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Amazon AWS iOS SDK -
Spotify iOS API
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Prowl (Growl) iOS client
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Yahoo Finance iOS API
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Sparrow Open Source Game Engine
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2D Game Framework
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10 iOS Libraries to Make Your Life Easier
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Foursquare API v2 for iOS
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Nimbus Kit (github/jverkoey)
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ASIHTTPRequest (guthub/afnetworking)
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FDKeyChain (github/reidmain)
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Macros (github/reidmain)
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BinPress iOS SDKs and Tools