The followings are useful cheat sheets for web developers who need to refer to certain syntax and code quickly and easily. They are printer-friendly so you can print them out and stick them on your wall like posters. For those who want a little more than cheat sheets, check our our recommended web development books for a list of books on Mobile Web Development, CSS, Javascript & AJAX and API & Web Services.
The Web Developer's SEO Cheat Sheet
Really Simple Syndication (RSS) Cheat Sheet
Dreamweaver Quick Reference, Adobe Dreamweaver CS3 Cheat Sheet 
Drupal Theme Developer's Cheat Sheet
[tags]cheatsheets, cheat sheets, pdf, web developers, web development[/tags]
Nice post. Thank you for the info. Keep it up.
While these are useful, don’t you feel most developers are at least an intermediate level should know 90% of these by heart?
@Cnizz Web Development The php one is useful, the php dev team can’t seem to keep their variable orders consistent (or function names for that matter)