A collection of regular expressions submitted by viewers.

Native Haskell implementation of polymorphic regular expressions. The regexps contains most of the features found in Perl.

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.

Describes Regular Expressions and compares them to Finite Automatas.

The source code shows how to use Regular Expressions in C#.

Uses browser's JavaScript to show matches and subgroups, and highlights match in the input string.

An open source tool written in C# to build and test regular expressions.

An online utility that helps analyzing regular expression structure.

Regular expression library for Visual Basic and Visual Basic for Applications.

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]