Steel Rats is a gui wrapper for the command line source code auditing tool RATS. It examines C, Perl, php and python code for keywords that could cause security holes and provides a report for you to further investigate the possible security holes.
CoolPHPUnit: A webbased GUI for PHPUnit from Sebastian Bergmann with easy excution of unit tests. The testcase runner gives colored, dynamic feedback of the tests progress. -- Cola: An Object for a Configuration Language in a TypoScript like Syntax.