Grid system (gutter free) based on bootstrap grid naming.

grid-system-susy.sass

// @author: Stefano Cerelli
// @grid system like Bootstrap

+layout(12)
$total-columns: 12
$gutter: 0
$screen-sm: 768px
$screen-md: 992px
$screen-lg: 1200px
$spacer-base: 8


.clearfix
  &:before,&:after
    content: ""
    display: table
  &:after
    clear: both

.row
  +full

.container
  width: 100%
  max-width: 1170px
  margin: 0 auto
  @extend .clearfix

.container-fluid
  width: 100%
  @extend .clearfix

@for $i from 1 to susy-get(columns)+1
  .col-xs-#{$i}, .col-sm-#{$i}, .col-md-#{$i}, .col-lg-#{$i}
    +span($i of $total-columns $gutter)
    @if $i != susy-get(columns)+1
      .col-xs-#{$i}:last-of-type, .col-sm-#{$i}:last-of-type, .col-md-#{$i}:last-of-type, .col-lg-#{$i}:last-of-type
        +last()

//spacers
@for $i from 1 to 9
  $newSpacer: $spacer-base * $i
  .spacer-#{$i}
    padding-left: #{$newSpacer}px
    padding-right: #{$newSpacer}px
  .spacer-left-#{$i}
    padding-left: #{$newSpacer}px
  .spacer-right-#{$i}
    padding-right: #{$newSpacer}px

@media screen and (min-width: $screen-sm)
  @for $i from 1 to susy-get(columns)+1
    .col-sm-#{$i}
      +span($i of $total-columns $gutter)
      @if $i != susy-get(columns)+1
        .col-sm-#{$i}:last-of-type
          +last()

@media screen and (min-width: $screen-md)
  @for $i from 1 to susy-get(columns)+1
    .col-md-#{$i}
      +span($i of $total-columns $gutter)
      @if $i != susy-get(columns)+1
        .col-md-#{$i}:last-of-type
          +last()

@media screen and (min-width: $screen-lg)
  @for $i from 1 to susy-get(columns)+1
    .col-lg-#{$i}
      +span($i of $total-columns $gutter)
      @if $i != susy-get(columns)+1
        .col-lg-#{$i}:last-of-type
          +last()