Jenny – A tool for generating regression tests (2005)

Also an article[1] on IPOG (In Parameter Order General) if your interested in test case generation stratagies. There is also an article[2] by NIST if your interested in combinatorial testing.

[1] http://csrc.nist.gov/acts/ecbs-cr-final.pdf

[2] http://csrc.nist.gov/groups/SNS/acts/documents/SP800-142-101...