Regular Expressions

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

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

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. <small>(October 30, 2000)</small>
http://zez.org/article/articleview/11/

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

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/

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

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/

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/

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

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

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/KB/asp/easyrx.aspx

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

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

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

RegexPal - JavaScript regular expression tester with real-time regex syntax and match highlighting.
http://regexpal.com/

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/

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

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

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

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

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

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

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

Regular Expression Analyzer - An online utility that helps analyzing regular expression structure.
http://regexp.resource.googlepages.com/analyzer.html

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

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

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

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

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

Visual RegExp - A graphical explorer for your regular expressions. Requires Tcl/Tk 8.x.
http://laurent.riesterer.free.fr/regexp/

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

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

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

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/

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

TRegExpr - A Delphi port of Henry Spencer V8-routins for working with a subset of Perl Regular Expressions. Full source code in object pascal included. No DLL needed. [Freeware]
http://www.regexpstudio.com/TRegExpr/TRegExpr.html

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