Best Regex tool?

@ptarjan get all tweets and run a regex for twitpic, jpg png? Your recent SO que way!

re-try - Python regex evaluator
Test a Python regular expression on text and get results.

Do regular expressions like a pro
Regular expressions (a.k.a. regex) is not for the faint hearted. It sometimes seems like a programming language on its own. Unless you use it on a daily basis, you tend to forget how to extract an URL from text or how to properly validate an email...

a lot of my code assumes that d caret character matches d regex start of string, when it matches the line instead.

Do regular expressions like a pro
Regular expressions (a.k.a. regex) is not for the faint hearted. It sometimes seems like a programming language on its own. Unless you use it on a daily basis, you tend to forget how to extract an URL from text or how to properly validate an email...

My RegEx that filters emails from Apple domains (for Indies setting up NFR offers). How can it be improved? http://gist.github.com/245601

My RegEx that filters emails from Apple domains (for Indies setting up NFR offers). How can it be improved? http://gist.github.com/245601

笔记：如何写出高效率的正则表达式
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Daring Fireball: A Liberal, Accurate Regex Pattern for Matching URLs
Then number of times I've written, re-written, googled for, and generally had to implement one of these is verging on the insane. This one looks good, so I am noting it so I can come back and find it whenever this comes up again.

You Don’t Know Anything About Regular Expressions: A Complete Guide - Nettuts+
Neat regex URI parsing, level=beginners

Regular Expression Library
Welcome to RegExLib.com, the Internet's first Regular Expression Library.

You Don’t Know Anything About Regular Expressions: A Complete Guide - Nettuts+
You Don’t Know Anything About Regular Expressions: A Complete Guide

Expresso Regular Expression Development Tool
Ultrapico is excited to announce Expresso 3.0, a major enhancement to the the award winning regular expression development tool. All of the features of Expresso 2.1 are preserved, but with major improvements to the user interface, the Builder and the...

http://txt2re.com/ is my new favourite site - Suck on that regex woot!

Sık Kullanılan Regex'ler
Sık Kullanılan Regex'ler

Roundup: The Best Web Design Cheat Sheets « designtopx
A number of elements are covered including PHP, regex, wordpress, css, fonts, gimp, html, javascript, jQuery, mod rewrite, mysql, photoshop, and more. Note: All cheat sheets are in .PDF format.