Other utilities

Opacity

.o-0 { 
  opacity: 0;
}
.o-1 { 
  opacity: 1;
}

Pseudo elements

.no-before:before { 
  display: none;
}
.no-after:after { 
  display: none;
}

Display

.inline { 
  display: inline;
}
.block { 
  display: block;
}
.inline-block { 
  display: inline-block;
}
.no-display,
.hidden { 
  display: none;
}

Vertical align

.v-a-t { 
  vertical-align: top;
}
.v-a-m { 
  vertical-align: middle;
}
.v-a-b { 
  vertical-align: bottom;
}

Other properties

.no-float { 
  float: none;
}
.no-wrap { 
  white-space: nowrap;
}

Z-index

.z-i-0 { 
  z-index: 0;
}
.z-i--1 { 
  z-index: -1;
}
.z-i-1 { 
  z-index: 1;
}
.z-i--2 { 
  z-index: -2;
}
.z-i-2 { 
  z-index: 2;
}
.z-i--3 { 
  z-index: -3;
}
.z-i-3 { 
  z-index: 3;
}
.z-i--4 { 
  z-index: -4;
}
.z-i-4 { 
  z-index: 4;
}
.z-i--5 { 
  z-index: -5;
}
.z-i-5 { 
  z-index: 5;
}