The Clang Static Analyzer, usually called "Clang" . It uses compiler techniques to analyze the structure of C and Objective-C programs to identify bugs.
It can detect memory leaks, double-frees, bad pointer references, and other such bugs, that will otherwise take your significant efforts to fix. It creates a report showing a bunch of possible bugs and/or problems with your code.
I am using it currently , will blog more about it in coming days..
Some use full links:
http://iphonedevelopment.blogspot.com/2009/02/clang-static-analyzer.html
http://www.rogueamoeba.com/utm/2008/07/14/the-clang-static-analyzer/
