Regex Builder Tool
Sara links to the Regex Builder Tool in the Powertoys Weblog. Check it out here:
If you use Regular Expressions, you need to check out this Regex Builder tool
One of my coworkers in Visual Studio has created this really cool tool for creating and testing Regular Expressions. I’ve just recently started using .NET Regular Expressions in my Editor testing, so take my word for it that this tool greatly helps with writing regular expressions.