CSS Scrollbars for Ace Editor
Simple to use CSS styled scrollbars:
Just link to two files then initialise the scrollbars after initialising Ace.
<link rel="stylesheet" type="text/css" href="https://github.com/ukandrewc/Ace-Scrollbars/blob/master/ext-scrollbar.min.css">
<script src="https://github.com/ukandrewc/Ace-Scrollbars/raw/master/ext-scrollbar.min.js"></script>
<script>
// Ace initialisation
var editor = ace.edit("editor")
// Create new scrollbars
new AceScrollbars(editor)
...
</script>