Using Regular Expressions
Good overview of regular expression operators, although some features described might not be available in your implementation.
Unicode Regular Expression Guidelines
Unicode Technical Report #18: This document describes guidelines for how to adapt regular expression engines to use Unicode.
Seeing With C - Regular Expressions
A writeup on regular expressions connecting the math. and the CS views to regular expressions.
Regular Expressions Tutorial at Zvon
A tutorial with many examples which can be downloaded for off-line use.
Regular Expressions Tutorial
A tutorial and reference for many popular regular expression flavors used by programming languages like Perl, PHP, Java, C# and VB.NET as well as a description of general tools like PowerGREP and EditPad.
Regular Expressions Reference
Downloadable reference with examples, by Miloslav Nic.
Regular expressions in UNIX (Spring 1995)
Slightly inaccurate (mixes in glob patterns and calls them "shell regular expressions") but otherwise a good concise summary of plain vs extended regular expressions.
Regular Expressions in ne (Nice Editor)
A description of the regular expression support in ne (Nice Editor).
Regular Expressions HOWTO The Basics of REReplace REFind
By Pete Freitag. The basics of using regular expressions with ColdFusion's REFind, and REReplace functions.
Regular Expressions: An Introduction
An essential guide to one of the most useful tools in the web development: regular expressions.
