As I work on projects for customers, sometimes there are side-projects not directly relating to (and also not payed by) the customer but nonetheless required to get the job done. Most of these projects never see the light of the day, but somethimes those gems are unearthed.

• AnaLyzard - an application that provides a framework for all data-analysis you might want to perform as part of troubleshooting.
• RegExTester - a little application to test-drive and pre-compile regular expressions for .NET applications.