HTML 5 Cheat sheet

• HTML5 canvas cheat sheet  
• HTML5 Elements and Attributes

http://www.reddit.com/domain/simon.html5.org/

Scripting Languages: PHP, Perl, Python, Ruby

a side-by-side reference sheet

1. arithmetic and logic
2. strings 
3. dates and time 
4. arrays 
5. dictionaries 
6. functions 
7. execution control 
8. environment and i/o 
9. libraries and modules 
10. objects 
11. reflection 
12. web 
13. java interop 
14. history

 http://hyperpolyglot.org/scripting

Ultimate IE6 Cheatsheet: How To Fix 25+ Internet Explorer 6 Bugs

Written by Benjamin / September 15, 2009

The best strategy for dealing with Internet Explorer 6 is not to support it.

Stop. Ok, I feel your frustration. You're a web developer and you're ready to tear your hair out because you have to support Internet Explorer 6, but, to put it tactfully, IE6 doesn't support you. You've spent hours on it, but you just can't seem to get your layout right. I can empathize. I can also help.

This isn't one of those rants about IE6 or a campaign to try to kill it. There are enough of those around the web, but they don't help if you need to support IE6 because it still has a significant enough marketshare that you can't ignore it for business reasons. No, this is the resource you've been hoping for.

I've scoured the web for resources and also included some of my own fixes for IE6 and now I've put it all together in this cheetsheet/reference manual as a resource for anyone who has to deal with Internet Explorer 6. Where possible, I've done my best to provide the cleanest and valid solutions to each bug instead of ugly hacks. I've also tried to give proper credit for each case, but some of the solutions have been shared so many times that finding the original discover of each fix is difficult. If you see a missing credit or if I missed a bug and fix, please contact me and let me know and I'll update this page.

This massive IE6 guide took a while to put together, so bookmark it, share it, tweet it, and use it to save yourself and your coworkers hours of screaming at your monitor and banging your head against your desk or other inanimate objects. Don't be fooled, however, this cheatsheet is as much for me as it is for you.

http://www.virtuosimedia.com/tutorials/ultimate-ie6-cheatsheet-how-to-fix-25-internet-explorer-6-bugs

The Best Cheat Sheets for Web Developers

Cheat sheet is a reference tool that provides simple, brief instructions for accomplishing a specific task. We have collated a set of best cheat sheets for web developers. It includes some of the popular programming language, e.g. jQuery, Mootools, Prototype, PHP, MySQL and etc…

http://www.webappers.com/2008/11/05/best-cheat-sheets-for-web-developers/