Mark has had a busy week to be sure. He spent it building out 6 developer machines in a seriously challenging, heavily locked down environment. You know the sort, one of those where you can just never get PSCONFIG to connect to SQL Server because, unbeknownst to you, there are IPSec policies blocking your traffic, system policies meaning your admin account is not really an admin, and coffee that despite being fresh from the machine is just too cold. Anyway, you get the idea.
Anyway, after overcoming these hurdles he has put together a great list of tools, essential to every SharePoint developers desktop!