Java mutation testing/fuzzing

http://en.wikipedia.org/wiki/Mutation_testing

http://jester.sourceforge.net/

http://jumble.sourceforge.net/

http://cs.gmu.edu/~offutt/mujava/ µJava http://muclipse.sourceforge.net/

http://www.doc.gold.ac.uk/~mas01sd/mutants/index.html

http://www.nada.kth.se/~karlm/a_mutation_testing_tool_for_java.pdf

http://www.laughingpanda.org/mediawiki/index.php/Test_Police