Interactive Git Cheatsheet, categorizing commands based on what they affect.
Cheatsheets for Ruby on Rails
jQuery Cheatsheet in HTML with links to the original API documentation
Choosing the perfect web safe font for your website
If you think typography is simply about personal whim this infographic should go a long way towards disabusing you of your ignorance.
It is my honor and privilege today to introduce the brand new version of The Web Developer's SEO Cheat Sheet. This free and downloadable cheat sheet covers all of the important SEO code and best practices that are needed by online marketers and developers.