All cards

AMSLaTeX Quick Reference Card
Joseph H. Silverman

AMSTeX Quick Reference Card
Joseph H. Silverman

ANSI C Quick Reference Card
Joseph H. Silverman

Apache 1.3 Quick Reference Card
Andrew Ford

ASN.1 Reference Card
OSS Nokalva, Inc
A tri-fold reference to Abstract Syntax Notation One, a standard notation for describing data structures for representing, encoding, transmitting, and decoding data.

ASP/VBScript Cheat Sheet
Dave Child

Asterisk Reference Card
Stefan Wintermeyer

Catalyst Quick Reference Card ^DRAFT
Andrew Ford
Perl web application framework

CSS Cheat Sheet
Dave Child
Single page reference to CSS 2.1.

CSS Level 1 Quick Reference
DeepX Ltd

CSS Level 2 Quick Reference
Benjamin Jung

CVS Quick Reference Card
Andrew Ford
A tri-fold PDF reference for the CVS version control system.

CVS Quick Reference Card
Laurent Grégoire

Debian GNU/Linux Reference Card
W. Borgert

DOC++
Steven Gould
A two-page, tri-fold guide to the DOC++ documentation system.

Firebird 2 Cheat Sheet
Lorenzo Alberton
single-page A4 reference to Firebird database, covering data types, functions, etc.

Mozilla Firefox Cheat Sheet
Leslie Franke
Covers keyboard shortcuts for the Firefox web browser

GNU Emacs Reference Card
Steven Gildea

GDB Quick Reference
Roland H. Pesch

HTML Cheat Sheet
Dave Child
single-page A4 quick reference for HTML

HTML Character Entity Cheat Sheet
Dave Child
single-sided A4 cheat shet listing HTML character codes

JavaScript Cheat Sheet
Dave Child

LaTeX Cheat Sheet
Winston Chang

HTML::Mason Reference Sheet
David Baird
tri-fold card covering the Perl-based web framework

Mediawiki
Michael Janich

Microformats Cheat Sheet
Dave Child
single page A4 cheat sheet

Microformats Cheat Sheet
Brian Suda

MIPS Reference Card
Jan Wätzig
two page overview of MIPS32 assembler

Mod_perl Quick Reference Card
Andrew Ford
A two page, tri-fold guide to the Perl module for Apache.

Mod_rewrite Cheat Sheet
Dave Child
single page A4 guide to the mod_rewrite Apache module

MySQL Cheat Sheet
Dave Child
single page, A4 cheat sheet covering functions and data types

OpenSSH Configuration Quick Reference
Jialong He

Perl Best Practices
Johan Vromans
summary of the best practices advocated by Damien Conway

Perl Quick Reference Card
John Bokma

Perl Regular Expressions
Iain Truskett
A 2-page, tri-fold overview of regular expressions in Perl

Perl Testing Reference Card
Ian Langworth
Tri-fold reference to Perl testing modules, that led to an O'Reilly book.

Perl Debugger Reference Card ^DRAFT
Andrew Ford
Tri-fold reference to the Perl debugger

Perl XML::LibXML ^DRAFT
Andrew Ford
Concise tri-fold reference to the Perl interface to libxml2.

PHP 4 Reference Card
Steven Gould

PHP Cheat Sheet
Dave Child

PostgreSQL Cheat Sheet
Lorenzo Alberton
single-page A4 reference to PostgreSQL data types, functions, etc.

Proof correction marks
Conrad Taylor
A ready reference to the more common proof correction marks in the most recently published British and ISO standards.

Prototype 1.5.0 Cheat Sheet
Jonathan Snook

Python 2.4 Quick Reference Card
Laurent Pointal
extensive 17 page, 3 column reference on Python

Regular Expressions Cheat Sheet
Dave Child
single page, A4 cheat sheet on regular expressions

Ruby on Rails Cheat Sheet
Dave Child
single A4 page cheat sheet

Sendmail Configuration Quick Reference
Jialong He

SQL Server Cheat Sheet
Dave Child
Single page reference to Microsoft's database server

TAPI Quick Reference
Jialong He

TeX Quick Reference Card
Joseph H. Silverman

Template Toolkit Quick Reference Card ^DRAFT
Andrew Ford
tri-fold reference to this sophisticated templating system.

UML Quick Reference Card
Laurent Grégoire

UML Quick Reference
Allen Holub

Vi Reference Card
Don Bindner
overview of that *other* editor

VIM Quick Reference Card
Laurent Grégoire

XEmacs Reference Card
Ben Wing

XML 1.0 Syntax Quick Reference
Mulberry Technologies

XML Schema - Data Types Quick Reference
Dan Vint

XML Schema - Structures Quick Reference
Dan Vint

XPath
DeepX Ltd

XSLT 1.0 Quick Reference
DeepX Ltd

XSLT 1.0 and XPath 1.0 Quick Reference
Mulberry Technologies