ssik

The Easy Floating Call Now Button plugin allows you to add a highly customizable “Call Us” button to your WordPress site. Features include:
<ul>
<li>Customizable colors for button and text</li>
<li>Mobile and desktop visibility settings</li>
<li>Lightweight and efficient design</li>
<li>Fully responsive</li>
</ul>

Easy Floating Call Now Button

Adds a customizable floating call button to your website.

Joe Nickdow

This plugin adds a customizable click to call bar/call now button to the bottom of the window for mobile users. It will allow users to easily call you from their phone. It automatically adds events if you’re using Google Analytics Universal.
Perfect for small businesses like restaurants, retail stores or any lead generation that relies on phone calls.

Really Simple Click To Call Bar

A simple plugin that adds a click to call bar/call now button for mobile visitors.

Easy Floating Call Now Button vs Really Simple Click To Call Bar