Regulator 2.0, currently in Beta, allows you to verify the regular expressions that you write work as expected. I know that there have been many times that I wanted to make sure that the regular expression that I was putting together was actually going to match what I thought it would, but I had no way to test this except for just running my app. Now, I could just run it through Regulator and make sure that I’ve written in correctly.
Note that Regulator 2.0 requires the .NET Framework v1.0, which can be downloaded from Microsoft’s site.
Via Dan Crevier.