My LESS mixins.

gistfile1.css

.transition( @trans: @transition ) {
	transition: @trans;
	-ms-transition: @trans;
	-moz-transition: @trans;
	-webkit-transition: @trans;
	-o-transition: @trans;
}

.transitionDelay( @delay ) {
	transition-delay: @delay;
	-ms-transition-delay: @delay;
	-moz-transition-delay: @delay;
	-webkit-transition-delay: @delay;
	-o-transition-delay: @delay;
}

.transform( @trans: @transform ) {
	transform: @trans;
	-ms-transform: @trans;
	-moz-transform: @trans;
	-webkit-transform: @trans;
	-o-transform: @trans;
}

.backfaceVisibility( @v ) {
	backface-visibility: @v;
	-webkit-backface-visibility: @v;
	-moz-backface-visibility: @v;
	-o-backface-visibility: @v;
	-ms-backface-visibility: @v;
}

.transformOrigin( @orig: @origin ) {
	transform-origin: @orig;
	-ms-transform-origin: @orig;
	-moz-transform-origin: @orig;
	-webkit-transform-origin: @orig;
	-o-transform-origin: @orig;
}

.animation( @anim ) {
	animation: @anim;
	-ms-animation: @anim;
	-moz-animation: @anim;
	-webkit-animation: @anim;
	-o-animation: @anim;
}

.perspective( @perspective ) {
	perspective: @perspective;
	-ms-perspective: @perspective;
	-moz-perspective: @perspective;
	-webkit-perspective: @perspective;
	-o-perspective: @perspective;
}

.borderImage( @border ) {
	border-image: @border;
	-ms-border-image: @border;
	-moz-border-image: @border;
	-webkit-border-image: @border;
	-o-border-image: @border;
}

.position( @top, @right, @bottom, @left ) {
	top: @top;
	right: @right;
	bottom: @bottom;
	left: @left;
}

.arrow( @size ) {
    display: block;
    width: 0;
    height: 0;
	content: '';
	border: @size solid transparent;
}

.boxSizing( @str: border-box ) {
	box-sizing: @str;
	-ms-box-sizing: @str;
	-moz-box-sizing: @str;
	-webkit-box-sizing: @str;
	-o-box-sizing: @str;
}

.gradientV( @start_color , @end_color ) {
	background-image: linear-gradient( center bottom, @end_color 0%, @start_color 100% );
	background-image: -ms-linear-gradient( center bottom, @end_color 0%, @start_color 100% );
	background-image: -moz-linear-gradient( center bottom, @end_color 0%, @start_color 100% );
	background-image: -webkit-gradient( linear, 0% 0%, 0% 100%, from( @start_color ), to( @end_color ) );
	background-image: -o-linear-gradient( center bottom, @end_color 0%, @start_color 100% );
}

.gradientH( @start_color , @end_color ) {
	background-image: linear-gradient( left center, @end_color 0%, @start_color 100% );
	background-image: -ms-linear-gradient( left center, @end_color 0%, @start_color 100% );
	background-image: -moz-linear-gradient( left center, @start_color 0%, @end_color 100% );
	background-image: -webkit-gradient( linear, 0% 0%, 100% 0%, from( @start_color ), to( @end_color ) );
	background-image: -o-linear-gradient( left center, @end_color 0%, @start_color 100% );
}

.fontSmoothing( @str ) {
	font-smoothing: @str;
	-ms-font-smoothing: @str;
	-moz-font-smoothing: @str;
	-webkit-font-smoothing: @str;
	-o-font-smoothing: @str;
}

.textOverflow() {
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

.row( @margin: -2% ) {
	margin-left: @margin;
}

.column( @width, @margin: 2% ) {
	display: inline;
	float: left;
	width: @width - @margin;
	margin-left: @margin;
}