Maybe I'm just not that good at "the google" but I needed to debug some regular expressions in C#.  I wanted a simple form that I could type in a regular expression and check it against a bunch of values.  Couldn't find it.  Like I said -- maybe I just wasn't searching for the right keywords.

This little app isn't going to change the world but if you need to debug some .NET regular expressions, here ya go.

Online Regular Expression Debugger for .NET

-Ben