WebXApp

<h4>WordPress custom scrollbar</h4>
WordPress custom scrollbar is highly customizable WordPress plugin. Features include vertical and/or horizontal scrollbar(s), adjustable scrolling momentum, mouse-wheel, keyboard and touch support, ready-to-use themes and customization via CSS.
<h4>Features</h4>
Custom Selector Scrollbar 
Full page Scrollbar 
Single Content Scrollbar 
Vertical and horizontal scrollbar support 
Highly Customizable 
ScrollBar scroll speed control 
Responsive for all devices 
Easy to handle

Scrollbar by webxapp – Best vertical/horizontal scrollbars plugin

Customizable WordPress scrollbar plugin. Vertical/horizontal, momentum scrolling, mouse-wheel, keyboard, touch support, themes, CSS customization.

Zia Imtiaz

Easy-to-use solution to have a custom scrollbars compatible with desktop,laptop, tablet and phone devices.
Simple installation and activation, it works with NO modification of your code. 
Very stylish scrollbars, with no occupation on your window (original browser scrollbars need some of page space and reduces window/div usable width)
Facilities:
<ul>
<li>Easy to installation</li>
<li>Unlimited colors themes</li>
<li>Height & Width Customizable</li>
<li>Speed & AutoHide mode Customizable</li>
<li>Responsive for all devices</li>
<li>Custom control plugin</li>
<li>Supported of all mejor browsers</li>
<li>For all WordPress versions</li>
<li>And many more…</li>
</ul>
Plugin Features:
 <a href='http://web-settler.com/scrollbar-designer/' rel="nofollow ugc">Premium version</a> 
* Supports full features.
<ul>
<li>On/Off switch.</li>
<li>Auto Hide Scrollbar</li>
<li>Scrollbar Cursor Color.</li>
<li>Scrollbar Cursor Width.</li>
<li>Scrollbar Cursor Boarder Width.</li>
<li>Scrollbar Cursor Boarder Style.</li>
<li>Scrollbar Cursor Boarder Color.</li>
<li>Scrollbar Cursor Boarder Radius.</li>
<li>Rail Color With Opacity.</li>
<li>Scrollbar Rail Position.</li>
<li>Scrollbar Opacity When Active.</li>
<li>Mouse Scroll Step..</li>
<li>Smoth Scroll.</li>
<li>Mouse Whele Scroll.</li>
</ul>
Fully integrated with jQuery 
Compatibile with jQuery UI, jQuery Touch, jQuery Mobile

Scrollbar Designer

Get rid of boring scrollbar and make your own Custom Scrollbar for your website.

Scrollbar by webxapp – Best vertical/horizontal scrollbars plugin vs Scrollbar Designer