I have created an article for TechNet Wiki called BizTalk Server 2010 – Tools and it is a compilation of all tooling available through Codeplex or Microsoft Download Center. These tools are not provided out of box with BizTalk Server 2010, but can be of tremendous help in debugging, logging, testing, troubleshooting, documenting solution, and performing health checks and benchmarking of your BizTalk environment. The number of tools listed and of codeplex projects pretty much covered in the article. Thanks to Colin Meade the Orchestration Profiler can be of used with BizTalk 2010. If you feel there is a tool that I have missed, which can be beneficial in any way, please feel free to add comment to the article.