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]
RegexBuddy
Tool for creating, debug, implement and save regular expressions for Windows and Linux. [Commercial]
RegEx Tester
Online regular expression tester for preg (Perl) and ereg (POSIX) formats.
Regex Suite
Brings the power of regular expression searching and replacing to Frontier 5. [GPL]
The Regex Coach
Graphical application for Linux and Windows which can be used to experiment with (Perl-compatible) regular expressions interactively.
12 Reasons to Use Regular Expressions
An article that gives 12 reasons for learning and using Regular Expressions.
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.
Power REGex TESTER
An online tool for creating and testing regular expressions.
PCRE Wrapper for Delphi 7
Provides Wrapper classes that provide PCRE for Delphi.
PCRE Workbench
Graphical application for Windows which can be used to experiment with Perl-compatible regular expressions interactively.