iOS third party developments http://www.scoop.it/t/ios-third-party-developments
Open Source Code Libraries for iPhone/iOS http://www.idev101.com/libraries.html
12 Open Source Libraries to Speed Up Your iOS Development http://joshgrenon.com/blog/2011/03/21/12-open-source-libraries-to-speed-up-your-ios-development/
iOS OpenSource Library Collection http://iphone.oni.tw/2011/08/ios-opensource-library-collection.html
iphone开发资源汇总 http://blog.csdn.net/diyagoanyhacker/article/details/7173258