Yesterday I had the need to create a regular expression in Powershell and stumbled across an amazing website that allows you to:
1) Paste in the text you are working with
2) Adjust your Regex on the fly and have it highlight text that matches that expression
How cool is this!?
I take no credit for the site whatsoever, I am just posting here for future reference
http://gskinner.com/RegExr/
Cheers