Microsoft Management Console 3.0 Pre-Release (Based on Windows Server 2003 R2 RC0).
MMC 3.0 (formerly MMC 2.1) ships as a component in Windows Server 2003 R2 and Windows Vista, and continues to be the host for a variety of OS and 3rd party admin tools.
Download: Microsoft Management Console 3.0 Pre-Release (RC0)
View: What's New in MMC 3.0