A quick reference guide for CSS, listing selector syntax, properties, units and other useful bits of information.
HTML character entites
HTML4 cheat sheet
A quick reference for HAML. See more information about HAML here: http://haml-lang.com/docs/yardoc/file.HAML_REFERENCE.html
CoffeeScript cheat sheet compiled after following "CoffeeScript Koans" from sleepyfox
Cheat sheet for Markdown. See http://daringfireball.net/projects/markdown/syntax for more info.
Cheat Sheets by Tag