DebugDiag

Is DebugDiag still being developed? It seems to have stopped at 1.2

Or are there now 'better' tools

This might help. Tess also has a good video here

it looks like someone in the team heard you and realized that they forgot to release the final 1.2 version.

http://blogs.msdn.com/b/ajay_pathak/archive/2011/07/19/debugdiag-1-2-added-full-support-for-x64-systems.aspx

http://blogs.technet.com/b/tristank/archive/2011/07/19/debugdiag-1-2-64-bit-capable-net-2-0-compatible-released.aspx

http://blogs.technet.com/b/stefan_gossner/archive/2011/07/18/finally-debugdiag-1-2-available-on-microsoft-download-center.aspx

http://blogs.msdn.com/b/lagdas/archive/2011/07/19/debugdiag-1-2-is-now-rtw.aspx

http://support.microsoft.com/kb/2580960