Ivan Moore has released SimpleJester, The basic idea of Jester is that it mutates your source code, for instance by changing an == to a !=, runs all the tests, and sees if any of them report a failure. If none of them do, then the line of code tested is either unnecessary or untested. The results of a Jester run are often eye opening. This release make some much needed simplifications to the rather convoluted process of getting Jester to run.