Another great mini-library…
Bootstrap
by Mark Otto, Designer at 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.
Demo/Site: http://getbootstrap.com/
Mixins: https://github.com/twbs/bootstrap/tree/master/less/mixins
Github/Source: https://github.com/twbs/bootstrap