regular expressions

Regular Expression Info and Tips for Powershell
Windows PowerShell: Writing Regular Expressions
More Powershell RegEx fun (playing with ‘route Print’)
Regular expressions in PowerShell and Perl
Windows PowerShell in Action: Working With Text and Files in ...
Regular Expressions with Windows PowerShell
The PowerShell Guy : Regular Expressions and PowerShell Part 1
The PowerShell Guy : Regular Expressions and PowerShell Part 2
Effective PowerShell Item 9: Regular Expressions - One of the ...

Implementing Real-World Data Input Validation using Regular Expressions

Regular Expressions in Monad

 PowerShell ABC's - M is for Matching 

The .NET regular expression implementation allows for named captures 

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Regular-Expressions.info

Regular Expression HOWTO

Learning to Use Regular Expressions

Regular Expressions - a Simple User Guide

What the Heck is a Regular Expression Anyway?

Regular Expression Library

How To: Use Regular Expressions to Constrain Input in ASP.NET

Regex tutorial by Gerd Ewald