Formal languages
Regexp Syntax Summary Reference table for UNIX grep, Emacs, Perl, Python and Tcl regular expressions.
Regexp Syntax Summary
''Mastering Regular Expressions'' Official website for Jeffrey Friedl's book.
Jeffrey Friedl's Mastering Regular Expressions
A List of Regex Topics Wiki with various topics about regular expressions.
A list of Regex topics - CastleCopsWiki
Learning to Use Regular Expressions Brief regular expression tutorial by David Mertz
Learning to Use Regular Expressions
Regular expressions: a short tutorial A five-minute tutorial on how to learn the most useful regular expressions
Regular expressions: a short tutorial » The R Zone
PCRE Matching is NP-complete A proof that uses backtracking to solve 3-sat.
Perl Regular Expression Matching is NP-Hard
Regular Expressions Links Directory page from DiscoveryMedia.net
regular expressions directory - DiscoveryMedia.net
Using Regular Expressions Brief introduction to regular expressions
Etext Center: Services
Regular Expression Tutorial and Reference One of the most comprehensive, free regular expression tutorials on the net.
Regular-Expressions.info - Regex Tutorial, Examples and Reference - Regexp Patterns
Regular Expression Library Currently contains over 1000 expressions from contributors around the world.
Regular Expression Library
DMOZ listing computers programming languages
Open Directory - Computers: Programming: Languages: Regular Expressions
Pattern matching tools linguistics computation resources
Computational Resources for Linguistic Research
McCulloch and Pitts' neural logical calculus Some historical notes on McCulloch and Pitts' neural logical calculus, and the neural-net-related paper that ultimately led to Kleene's creation of regular expressions.
McCulloch and Pitts' neural logical calculus
CL-PPCRE , a fast, portable, Perl-compatible regular expression library for Common Lisp.
CL-PPCRE - portable Perl-compatible regular expressions for Common Lisp
There's a bit of http://www.froola.com in all of us.
TRE A portable, POSIX-compliant library using a new fast algorithm. Also supports approximate matching. Can handle UTF-32 text.
TRE home page
xpressive , a C++ library
TPerlRegEx Open source Delphi VCL component based on PCRE (included)
Delphi for Win32 (Windows) and .NET - Regular Expressions
regex , Henry Spencer's regular expression library for C
regex - Henry Spencer's regular expression libraries
PCRE Open source C library supporting Perl-style regular expressions. Can handle UTF-8 text.
PCRE - Perl Compatible Regular Expressions
jlex , JLex: A Lexical Analyzer Generator for Java(TM)
JLex: A Lexical Analyzer Generator for Java(TM)
The GRETA Regular Expression Template Archive C++ library
The GRETA Regular Expression Template Archive for C++
TRegExpr library Delphi open source library
TRegExpr library
WhatsMyIP.org Regexp Tester Simple web page to test a regular expression in PHP.
Regular Expression (RegExp) Tester
WebRegEx Free web-based tool to find regular expression matches in a given web page.
WebRegEx - Regular Expression Helper for Parsing Web Pages
^txt2regex$ Tool for building simple regular expressions from human language by answering the tool's questions. Generates regular expressions for 20 engines.
^txt2regex$
Boost.Regex C++ library with POSIX-Extended Syntax. A dialog to test regular expressions can be used freely. All sub-expressions and their matches are shown.
Boost.Regex: Index
TextTransformer Tool for building complete Parsers using the
The Regulator Free regular expressions testing and learning tool. Build and verify a regular expression against any text input, file or web. Displays matching, splitting or replacement results within an easy to understand, hierarchical tree.
Tcl Regular Expression Visualiser Tcl/Tk script for testing regular expressions.
trev
Regex.NET Tester Web page using .NET to test regular expressions online.
Regular Expression .NET Tester
froola rocks.
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