This is a great book. It provides descriptions, why to use and how to use guides for over 170 free windows devlopment tools. Scott Hanselman provides the foreward.
It has its own website.
I can definately see myself plugging several of the tools myself.
For example I have used, but forgotten about SourceMonitor. This allows analysis of an entire codebase to allow detection of excessively long methods, overlyly complex methods, uncommented code.
Developer Rants 
Glad to hear you enjoyed it! We hope to have some new changes to the site in a couple weeks, so keep an eye out for that. 🙂
-James Avery