Select.js

An easy way to make select elements look however you want them to look

Designed to function without external libraries

Using is simple

Deployment can be done in seconds

<link rel="stylesheet" href="themes/default/default.css">
<script src="javascripts/select.min.js"></script>

new Select({
  el: document.getElementById("your-select-id")
}).attach();

Official themes to select from