MVP Kevin Smith runs an open source project for automated testing of Microsoft BizTalk solutions. He developed BizUnit to help drive up the quality of BizTalk solutions. Since March 2007, he has received over 5,792 downloads across all build releases. The BizUnit tool is used by many BizTalk architects to performance test their BizTalk Server environments.
Learn more about BizUnit, and download it on CodePlex here