PHP + MySQL Cheat Sheets
The PHP scripting language has become one of the most popular server side languages around. Add to that, the power and integration of the open source MySQL database system, and you have a very powerful set of tools in your hand. That said, we will start off with some wonderful PHP and MySQL cheat sheets.
The AddedBytes cheat sheet above covers multiple php topics such as functions list and regular expressions.
If you would rather not download a php cheat sheet, BlueShoes has provided an online php cheat sheet available for you to access at anytime.
Regular expressions can get a little tricky no matter what language you are dealing with, WebCheatSheet has provided us with a quick online guide to php regular expressions.
Another excellent cheat sheet from AddedBytes, this regular expression cheat sheet is available as a pdf and packed full of helpful information.
Above you will find a helpful and quick online guide to basic and slightly complex MySQL commands.
If you're looking for a full fledged MySQL cheat sheet, look no further. The cheat sheet above (again, by AddedBytes) contains MySQL native functions, php MySQL functions, MySQL data types, and MySQL sample queries.
The WikiBook MySQL Cheat Sheet is an open and member contributed online MySQL guide. It has the advantage of constantly being updated as the database languages evolves.
Provided by the jQuery website, the jQuery visual map is a single (large) png image that allows you to visualize the jQuery API. It is perfect for a quick reference whilst working on a project.
The jQuery API browser is a way to access documentation on any function or feature of the jQuery language. Even better is the fact that you can download it as a stand alone Adobe Air application for you to use whenever you wish.
For those of you who prefer to download your cheat sheets in good ol' fashion pdf form, ACodingFool has come to our rescue. This cheat sheet covers the latest version of jQuery at the time of writing.
Time to give some love back to the Moo. This cheat sheet covers mootools v1.2+ and is really helpful for anyone starting to learn MooTools, or an old pro who just needs a refresher.
HTML and CSS Cheat Sheets
Go squared has put together an excellent and thorough HTML cheat sheet free for anyone to download. Especially great for beginners and those times when you just can't remember a certain tag.
As if AddedBytes haven't made enough cheat sheets for us already, they have made another one for HTML. This time it is available in two versions, as a pdf or as a single png image.
SmashingMagazine has released a wonderful and free HTML5 cheat sheet for you to start studying. Though we may not be at the point where we can use HTML5 everyday, it is always good to keep up with new technology.
Available in PNG or PDF format, this is an extremely thorough CSS cheat sheet you can refer to time and time again.
Seen above is a quick and dirty online CSS cheat sheet made by Leslie Franke. Great for quick access in the middle of a project.
Again, from SmashingMagazine comes another great freebie. This time it is a cheat sheet for CSS 3, which is gaining more and more browser support everyday.
Photoshop and Illustrator Cheat Sheets
All keyboard shortcuts organized into four pages, by menu, as well as alphabetically by key.
This comes from the same makers as the CS3 cheat sheet, this time it has been modified for CS4. You can download it for free and browse it as a pdf.
The Photoshop brush tool is a very powerful one that has many unknown features. Learn to master that tool and you will probably be more efficient when designing. Keeping this cheat sheet handy will help you to learn all you need to know about the Photoshop brush tool.
We're going to consider this an online cheat sheet, as it is just so darn helpful. You can choose from a wide list of Photoshop topics on the left to bring up more information about them. Think of it as an interactive cheat sheet.
This is a great online cheat sheet that gives you access and information about all of the Photoshop tools and their shortcuts.
The beautiful WebDesigerWall has put together an online cheat sheet and post full of tips for using Adobe Illustrator shortcuts.
This media pack comes with multiple pdfs packed with Adobe Illustrator shortcuts information and references. Also included in the pack are cheat sheets to other popular Adobe products.
Misc Cheat Sheets
For all of the WordPress lovers out there, WPCandy has put together an online WordPress 'help sheet' to get you any information you may have forgotten or not seen before.
Lastly, we have the all mighty SEO cheat sheet, kindly made for us by the guys over at the SEOMoz blog. Most websites could use some SEO once in a while, and this cheat sheet is a nice place to start.