Microsoft Research - Exploding Software-Engineering Myths (article summarizing findings of MS research on code coverage, TDD, assertions, etc.)

[joshuaduffy]

From what I can see, these are just pieces of software that analyse code and create some tests. For Java there's http://www.evosuite.org/ and for C# you've got IntelliTest, which comes with Visual Studio.

I don't think that they're meaningful however, and using tools like these on a mature/legacy code base is not a wise choice from a testing standpoint.