12 Reasons to Use Regular Expressions
   An article that gives 12 reasons for learning and using Regular Expressions.
   http://www.websiterepairguy.com/articles/re/12_re.html

A 'Print This Page' Script Using the MS-XMLHTTP object and Regular Expressions
   This article, by Troy Eberhard, examines how to create a Printer Friendly Page using Microsoft's XMLHTTP component along with regular expressions.
   http://www.4guysfromrolla.com/webtech/052701-1.shtml

An Introduction to Regular Expression with VBScript
   Articles in two parts about using Regular Expressions with VCScript.
   http://www.4guysfromrolla.com/webtech/090199-1.shtml

Common Applications of Regular Expressions
   This article by Richard Lowe demonstrates four powerful and practical applications of regular expressions.
   http://www.4guysfromrolla.com/webtech/120400-1.shtml

Data mining for reguar expressions.
   A tool that allows programmers to generate a working program in a variety of languages that extracts data mined regular expressions from strings.
   http://www.txt2re.com/

Extreg
   A script that allows to perform search-and-replace operations with extended regular expressions from unix shells.
   http://www.ososo.de/extreg/

JRX
   A simple JavaScript real-time regular expression evaluator, similar to RX tool of Activestate's Komodo IDE.
   http://www.cuneytyilmaz.com/prog/jrx/

KRegExpEditor - Manual
   A Manual describing the KDE Application for editing regular expressions.
   http://docs.kde.org/development/en/kdeutils/KRegExpEditor/

Larger Regular Expressions
   The purpose of this article is to show a few real-life examples of regular expressions at work.
   http://zez.org/article/articleview/65/

Matchmaking with regular expressions
   Shows how to use the power of regular expressions to ease text parsing and processing.
   http://www.javaworld.com/javaworld/jw-07-2001/jw-0713-regex.html

PCRE Workbench
   Graphical application for Windows which can be used to experiment with Perl-compatible regular expressions interactively.
   http://www.renatomancuso.com/software/pcreworkbench/pcreworkbench.htm

PCRE Wrapper for Delphi 7
   Provides Wrapper classes that provide PCRE for Delphi.
   http://www.renatomancuso.com/software/dpcre/dpcre.htm

Power REGex TESTER
   An online tool for creating and testing regular expressions.
   http://www.regextester.com/

Programmer's Heaven Regex Area
   Contains a beginners regex tutorial and guides for using regexes in various languages, including Perl, Java, .Net and Javascript. Also has a web-based regex testing tool and regex library.
   http://www.programmersheaven.com/2/Regex

RegEx Tester
   Online regular expression tester for preg (Perl) and ereg (POSIX) formats.
   http://www.quanetic.com/regex.php

RegExplorer
   A visual regular expression explorer, it allows for writing regular expressions and visually see the matches. Uses the KDE/Qt Libraries for the user interface. [QPL]
   http://regexplorer.sourceforge.net/

RegExpr for VB & VBA
   Regular expression library for Visual Basic and Visual Basic for Applications.
   http://www.aivosto.com/regexpr.html

Regex Suite
   Brings the power of regular expression searching and replacing to Frontier 5. [GPL]
   http://old.scriptmeridian.org/projects/regex/

RegexBuddy
   Tool for creating, debug, implement and save regular expressions for Windows and Linux. [Commercial]
   http://www.regexbuddy.com

Regular Expression Builder
   An open source tool written in C# to build and test regular expressions.
   http://renschler.net/RegexBuilder/

Regular Expression Tester
   Uses browser's JavaScript to show matches and subgroups, and highlights match in the input string.
   http://www.roblocher.com/technotes/regexp.aspx

Regular Expression Usage in C#
   The source code shows how to use Regular Expressions in C#.
   http://www.c-sharpcorner.com/UploadFile/prasad_1/RegExpPSD12062005021717AM/RegExpPSD.aspx

Regular Expressions
   Describes Regular Expressions and compares them to Finite Automatas.
   http://www.cs.rochester.edu/u/nelson/courses/csc_173/fa/re.html

Regular Expressions Library
   A collection of regular expressions submitted by viewers.
   http://www.regexlib.com/

Regular Expressions explained
   An article by Jan Borsodi that gives an introduction to the world of regular expressions. It explains what regular expressions are and introduces the syntax. Also provides examples with varying complexity and a list of tools which use regular expressions.
   http://zez.org/article/articleview/11/

Regular expressions in Haskell
   Native Haskell implementation of polymorphic regular expressions. The regexps contains most of the features found in Perl.
   http://www.dcs.gla.ac.uk/~meurig/regexp/

Simplifed use of Regular Expressions from within your Scripts
   A small library to make working with Regular Expressions a little bit easier. Free source code and tutorials for Windows developers.
   http://www.codeproject.com/asp/easyrx.asp

So What's A $#!%% Regular Expression, Anyway?!
   Learn how to use regular expressions and perform search and replace operations.
   http://www.melonfire.com/community/columns/trog/article.php?id=2

Stripping HTML Tags using Regular Expressions
   This article, by Scott Mitchell examines how to strip HTML tags from a string using regular expressions.
   http://www.4guysfromrolla.com/webtech/042501-1.shtml

TCL Regular Expressions
   An Introduction to Regular Expressions in the scripting language TCL.
   http://www2.lib.uchicago.edu/~keith//tcl-course/topics/regexp.html

The Regex Coach
   Graphical application for Linux and Windows which can be used to experiment with (Perl-compatible) regular expressions interactively.
   http://weitz.de/regex-coach/

Utilizing Regular Expression SubMatches
   This article by Scott Mitchell examines some advanced features with regular expressions.
   http://www.4guysfromrolla.com/webtech/043001-1.shtml

Utilizing Regular Expressions
   This article is a follow-up to an earlier 4Guys article "An Introduction to Regular Expression with VBScript". Regular Expression allows for complex pattern matching and replacing.
   http://www.4guysfromrolla.com/webtech/031500-1.shtml

VBScript Regular Expressions
   Describes the improved text handling functions of version 5 of VBScript through its support for Regular Expressions.
   http://authors.aspalliance.com/brettb/VBScriptRegularExpressions.asp

Validating Form Input using Regular Expressions
   Writing form validation code is often the most thankless part of your job. The logic can get quite complex, and often quite messy. This article will show how to use Regular Expressions to simplify your code.
   http://aspzone.com/blogs/john/articles/173.aspx

windows.oreilly.com -- C# Regular Expressions
   Brad Merrill, coauthor of O'Reilly's C# Essentials, provides an overview of how regular expressions are used in the C# environment.
   http://www.windowsdevcenter.com/pub/a/oreilly/windows/news/csharp_0101.html