Sass

［Sass］

sudo apt-get ruby
sudo apt-get rubygems
sudo gem --update system
sudo gem install sass

［Scss］

語法改良後的 Sass，同樣使用 sass 命令來編譯，副檔名通常是 *.scss

［Compass］

sudo gem install compass

http://designshack.net/articles/css/sass-vs-stylus-who-wins-the-minimal-syntax-battle/

Reference：
http://sass-lang.com
http://compass-style.org
http://blueprintcss.org
http://960.gs
http://upgrade2rails31.com/sass-scss
http://upgrade2rails31.com/compass
https://github.com/imathis/fancy-buttons