LESS for CSS is incredible! I’ve been using it on literally everything I do since the beginning of the year.
Dmitry Fadeyev has created a great library of re-useable LESS classes called elements, and I been using it extensively in my work. Elements.less contains a set of re-useable classes and mixins that help you cut down the size of your stylesheets, while speeding up your CSS workflow. I highly recommend checking it out!
Classes in Elements.less
.gradient .bw-gradient .bordered .drop-shadow .rounded .border-radius .opacity .transition-duration .rotation .scale .transition .inner-shadow .box-shadow .columns .translate
For more information visit the home of Elements.less.