x64 version of Debug Diag 1.1 troubleshooting tool has been released to web yesterday
After a long beta period the 64-bit version of Debug Diag 1.1 was made available for public download from Microsoft download center.
The Debug Diagnostic Tool (DebugDiag) is designed to assist in troubleshooting issues such as hangs, slow performance, memory leaks or fragmentation, and crashes in any user-mode process. The tool includes additional debugging scripts focused on Internet Information Services (IIS) applications, web data access components, COM+ and related Microsoft technologies.
The whitepaper about the tool has been updated as well.