CSS3 (if your browser supports)
<div class="marquee">jQuery marquee is the best marquee plugin in the world</div>

<br>

jQuery (check data attribute to disable CSS3 animation support)
<div class="marquee" data-allowCss3Support='false'>jQuery marquee is the best marquee plugin in the world</div>

.marquee {
  width: 300px;
  overflow: hidden;
  border: 1px solid #ccc;
  background: #ccc;
}

$('.marquee').marquee();