引导
设计师Mark Otto在Twitter

Bootstrap is a super awesome pack of
mixins and variables to be used in
conjunction with LESS,a CSS
preprocessor for faster and easier web
development.

演示/网站：http://getbootstrap.com/

混合：https://github.com/twbs/bootstrap/tree/master/less/mixins

Github / Source：https://github.com/twbs/bootstrap