CheatSheets are pieces of paper that sum up some importat aspects of a topic.
- Cheatography.com seems to be the biggest searchable cheatsheets, but also in pdf format, literally hundreds
- AddedBytes.com great summaries, some of them cost $2, but most are for free
- Woorkup.com they have a great jQuery cheatsheet, HTML5.
- Blueshoes.org have some handy PHP tables to clear up some common mistakes beginner programmers do
- Emezeta.com – has a hudge PHP cheatsheet, I printed it on A3 format and it is great
- Serversidemagazine.com has a fast prowsable page for quick reference
- Dreamincode.net – search for cheatsheet and you’l find a great PHP cheatsheet, and others for C++, C#, Ruby, VB.NET and much more
- Duvet-dayz.com – has a good cheatsheets for FireBug
- BegoodNotBad.com has an interesting cheatsheet widget on AppleStore, or directly there for CSS, PHP