I'm one of those OCD-developers that has to have my source artifacts formatted and organized for readability. So when I got a glimpse of Regionerate I was thrilled to see that there are like-minded folks in the open source community helping those of us out.
This kick-$%@! simple open source add-in for Visual Studio (2K5 and Orcas) and #develop applies automatic layout rules to your C# code. The site has a set of tutorials that explain how to use the tool, how to start applying your own custom rules (code layouts) and how to integrate it with NAnt to run and apply your rules during automated builds. Note to self: getting it to run with Team Builds (WIX) would be cool. The site also provides a gallery where people can upload custom layouts.
The creator Omer Rauchwerger has done a great job with this one. A+++ recommendation here...