I did this summarization when I added Lirate_CoffeeScript support for GitHub-Linguist, i.e how does GitHub do Marjdown render and code highlight in its front end.Lots of font end tools used by GitHub are open sourced. They are:1. HTML/CSS/JavaScript1.1 HTML templateGitHub markup and template styleguide : https://github.com/styleguide/templates1.2 Style and CSSGitHub uses replacement of CSS:SCSS：https://github.com/nex3/sassKSS：https://github.com/kneath/kssGitHub CSS styleguide : https://github.com/styleguide/css1.3 Behavior and JavaScriptGitHub uses CoffeeScript:CoffeeScript：http...