nicescroll

WS Custom Scrollbar plugin will enable change scrollbar styles where you can change scrollbar color, border radius, scroll speed, width.

A wrapper plugin for the Nicescroll library with full customization options for both frontend and backend.

As nice scroll is a jquery plugin for WordPress site. This plugin will create a nice scrollbar for your site.

Wp Custom scrollbar is nicescroll wordpress plugin.

R Nicescroll plugin is Simple wordpress plugin for Custom Scrollbar.