There are many cheat sheets or quick reference guides available for web developers. Use the following cheat sheets to quickly learn HTML5, CSS3 and jQuery:
- HTML 5 Cheat Sheets from around the web A collection of HTML5 cheat sheets that covers canvas, standard references and more.
- 20 Useful Collections of CSS3 Cheat Sheets. CSS3 cheat sheets that help you with selectors, basic markup, backgrounds and more.
If you need to find more cheat sheet for developers, devcheatsheet.com has them.