Chop Shop

This tool was mentioned to me by another consultant – it is a fantastic way to get a quick overview of an unfamiliar environment.
Scans for replication, ntp, site, subnet, dns, and all kinds of issues!
Find it here -
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=dd7a00df-1a5b-4fb6-a8a6-657a7968bd11