u-no-spacing

Code 
<div class="u-no-spacing">…</div>

u-quarter-spacing

Code 
<div class="u-quarter-spacing">…</div>

u-half-spacing

Code 
<div class="u-half-spacing">…</div>

u-normal-spacing

Code 
<div class="u-normal-spacing">…</div>

u-island

Code 
<ul class="u-half-spacing">
    <li>…</li>
    <li class="u-island">…</li>
    <li>…</li>
    <li>…</li>
</ul>

u-island-2

Code 
<ul class="u-half-spacing">
    <li>…</li>
    <li class="u-island-2">…</li>
    <li>…</li>
    <li>…</li>
</ul>

u-island-3

Code 
<ul class="u-half-spacing">
    <li>…</li>
    <li class="u-island-3">…</li>
    <li>…</li>
    <li>…</li>
</ul>

u-tight

Code 
<ul class="u-normal-spacing">
    <li>…</li>
    <li class="u-tight">…</li>
    <li>…</li>
    <li>…</li>
</ul>

u-snug

Code 
<ul class="u-normal-spacing">
    <li>…</li>
    <li class="u-snug">…</li>
    <li>…</li>
    <li>…</li>
</ul>

u-out-of-flow

Code 
<div style="position: relative;" class="u-normal-spacing">
    <div style="position: absolute; top: 0; right: 0" class="u-out-of-flow">…</div>
    <div>…</div>
    <div>…</div>
    <div>…</div>
</div>