Perl Regular Expression Quick Reference - One-page cheat sheet. Contains tables of syntax elements such as character classes, quantifiers and modifiers. How Regexes Work - Collection of Perl regex resources. Includes tutorial, slideshow, class summary, code modules, PDF e-book. MakeRegex - Perl module that creates regular expressions from word lists. Includes tester, instructions and download. Perl Regular Expressions - Tutorial. Covers matching, replacing and sample problems such as matching a file path's double dots. Perlfect - Online regex tester. Displays matches in bold. A Regex Introduction - Tutorial. Covers basic syntax, tricks and traps. Equinoxbase - Online application. Converts Perl 5 regexps for Perl 6. Perl.org - Regex resources on the official Perl site. Includes manual pages, tutorials and FAQs. CPAN - Collection of regex modules. Includes documentation and download. Perl Regular Expressions by Example - Basic introduction to Perl regex. Includes examples and partial syntax reference.