Counting with Regular Expressions - Abrazolica
Stop Validating Email Addresses With Your Complex Regex - davidcel.is
JavaScript Regular Expression Enlightenment - Tech.Pro
Stop Avoiding Regular Expressions Damn It - bradt.ca
www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html
Brain Dump (english): Arithmetic with Regexps
Why the hell am I building a product with a tiny market? - Debuggex
Best of Fluent 2012: /Reg(exp){2}lained/: Demystifying Regular Expressions - YouTube
An example driven guide to regular expressions | JoeJag :: Tech
Python, Catastrophic Regular Expressions and the GIL
Nested Regular Expressions explained | Linguistic forms
Details of Regular Expression Behavior
Bastards Book of Regular Expressions by Dan Nguyen [PDF/iPad/Kindle]
HTML5 Pattern
regexs for HTML5 input validation
REBEL - Kendall Frey's Website
Regular Expression Based Esoteric Language - a declarative programming language that works by iteratively replacing substrings
petere/pgpcre · GitHub
java - Cancelling a long running regex match? - Stack Overflow
Comparison of regular expression engines - Wikipedia, the free encyclopedia
Parsing Techniques - A Practical Guide | Hacker News
print "Me" -- portable perspectives
k-takata/Onigmo · GitHub
Ruby 2.0
Debuggex: A visual regular expression debugger
Can You Do the Regular Expression Crossword? - Slashdot
Security Briefs - Regular Expression Denial of Service Attacks and Defenses
Collaborative Manuscript Transcription: Bending Regular Expressions to Express Uncertainty
Regex Challenge - Week Twenty
chess move notation using the algebraic notation
A regular expression crossword puzzle [pdf]
Regex Challenge - Week Nineteen
all the valid HTML tag names in as few characters as possible
RegexOne - Learn regular expressions with interactive examples
Regular expressions - Rosetta Code
The 30 Minute Regex Tutorial - CodeProject
I don't like Regex... - CodeProject
Regex Challenge - Week Eighteen
check if a string is a valid IRC message sent to a user or channel
harthur/replace · GitHub
Command line search and replace utility (with js regex)
AT&T Research regex(3) regression tests
logentries/re2-java · GitHub
Vim Regular Expressions 101
Printable Regular Expressions Cheatsheet
Validate an E-Mail Address with PHP, the Right Way | Linux Journal
Regex Challenge - Week Seventeen
match valid regular expressions - just literal characters, character classes, and a few other minor features
Microsoft Research Mobile - The GRETA Regular Expression Template Archive
Boost C++ - References and Further Information - 1.52.0
tweetregs/regexes.md at master · pkedrosky/tweetregs · GitHub
Advanced Filters: Excel's Amazing Alternative To Regex
regex-dna benchmark | Computer Language Benchmarks Game
Regexper
Home · gabriel-weaver/xutools Wiki · GitHub
ArsalanBashir/RegexLove · GitHub
Incremental Regular Expressions
Google Spreadsheet Regular Expression Functions Are Insanely Useful
10 Java Regular Expression Examples You Should Know
Regex Challenge - Week Sixteen
match the elements with chemical numbers of above 50
Regex Challenge - Week Fifteen
match musical chord names such as Cmin, Bmaj
Regex Challenge - Week Fourteen
match all the valid chemical element short names
BlackOdd: Learning Regular Expressions / Regex [Part 1] - Character Classes, Elements and Quantifiers
Here's what ICT should really teach kids: how to do regular expressions | Technology | guardian.co.uk
How to Find or Validate an Email Address
Regex Challenge - Week Thirteen
match strings which have a word repeated directly below the same word on the previous line
Regex Challenge - Week Eleven
one space between words, and two spaces after full stops
Regex Challenge - Week Eleven
match strings where the letters are in alphabetical order
Regex Challenge - Week Ten
turn a sentence into a number of "tokens" that would be suitable for something like a search engine to use as keywords
Regex Challenge - Week Nine
parse MarkDown links
Regex Challenge - Week Eight
match (immediately) repeating MarkDown list items
eriksank/alt-regex-engine · GitHub
4.10.7.1 States of the type attribute — HTML5
My favorite regex of all time - good coders code, great reuse
It matches all ASCII characters from the space to the tilde
Regular Expressions Will Stab You in the Back - Cue:tech
Rubular - a Ruby regular expression editor | Hacker News
A Common Gotcha When Using Ruby Regexps For Input Validation - Jerod Santo
ReDoS - Wikipedia, the free encyclopedia

Also see links to other regex testing websites/programs on the Similiar Tools page.