gistfile1.css

/* 
Less CSS3 utils.

Usage:
  .fooClass {
    border: 3px solid #000;
    .vbg-gradient(#FFF, #CCC);
    .hbox();
  }
*/

.border-radius(@r: 3px) {
  -moz-border-radius: @r;
  -webkit-border-radius: @r;
  border-radius: @r;
}

/* Vertical Background Gradient */
.vbg-gradient(@fc: #FFF, @tc: #FFF) {
  background: @fc;
  background: -webkit-gradient(linear, left top, left bottom, from(@fc), to(@tc));
  background: -moz-linear-gradient(top, @fc, @tc);
}

/* Horizontal Background Gradient */
.hbg-gradient(@fc: #FFF, @tc: #FFF) {
  background: @fc;
  background: -webkit-gradient(linear, left top, right top, from(@fc), to(@tc));
  background: -moz-linear-gradient(left, @fc, @tc);
}

.box-shadow (@h: 0px, @v: 0px, @b: 4px, @c: #333) {
  box-shadow: @h @v @b @c;
  -moz-box-shadow: @h @v @b @c;
  -webkit-box-shadow: @h @v @b @c;
}

.inset-box-shadow (@h: 0px, @v: 0px, @b: 4px, @c: #333) {
  box-shadow: inset @h @v @b @c;
  -moz-box-shadow: inset @h @v @b @c;
  -webkit-box-shadow: inset @h @v @b @c;
}

.box-flex (@s: 0) {
  -webkit-box-flex: @s;
  -moz-box-flex: @s;
}

.hbox () {
  display: -webkit-box;
  -webkit-box-orient: horizontal;
  -webkit-box-align: stretch;
  -webkit-box-pack: left;
  
  display: -moz-box;
  -moz-box-orient: horizontal;
  -moz-box-align: stretch;
  -moz-box-pack: left;
}

.vbox () {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-box-align: stretch;
  
  display: -moz-box;
  -moz-box-orient: vertical;
  -moz-box-align: stretch;
}

Very nice ^^