efedorenko

// Turns out this function already exists in Sass: mix(fg, bg, %) (http://d.pr/mGqa)

// Alpha blending

@function blend($bg, $fg) {

	$r:   red($fg) * alpha($fg) +   red($bg) * (1 - alpha($fg));
	$g: green($fg) * alpha($fg) + green($bg) * (1 - alpha($fg));
	$b:  blue($fg) * alpha($fg) +  blue($bg) * (1 - alpha($fg));

thulstrup

$sprites: sprite-map("sprites/*.png");
$sprites-retina: sprite-map("sprites-retina/*.png");

@mixin sprite-background($name) {
  background-image: sprite-url($sprites);
  background-position: sprite-position($sprites, $name);
  background-repeat: no-repeat;
  display: block;
  height: image-height(sprite-file($sprites, $name));
  width: image-width(sprite-file($sprites, $name));

Snugug

//////////////////////////////
// Generalized Media Query Mixin
//
// Requires Sass 3.2+
// Until released:
// (sudo) gem install sass --pre
//////////////////////////////
@mixin media-query($value, $operator: 'min-width', $query: 'screen') {
  @media #{$query} and (#{$operator}: #{$value}) {
    @content;

micahgodbolt

// ---
// Sass (v3.2.9)
// ---


@mixin respond-to($queries...) {
    $length: length($queries);
    @for $i from 1 through $length{
        @if $i % 2 == 1 {
            @media screen and (min-width: nth($queries, $i)) { 

nickytonline