wpdewlab

Плагин предназначен для легкого создания виджета контактной формы для Вашео сайта. 
Этот виджет будет выполнять функцию “обратного звонка”. То есть на почту, указанную в настройках, Вам будет приходить номер телефона, который указал клиент в виджете на Вашем сайте.

Сallback Samlab widget

Плагин предназначен для легкого создания виджета контактной формы для Вашео сайта. Этот виджет будет выполнять функцию "обратного звонка".

hosting.io

Quick Contact and Call back widget, quickly add a call back widget to the sidebar of your website.
Colours are controlled via a colour picker in the settings. 
Times and messages can be customised to suit.
Our other free plugins can be found at https://profiles.wordpress.org/pigeonhut/
To see more about us as a company, visit https://hosting.io
Proudly made in Belfast, Northern Ireland.
<h3>License</h3>
WP Call Back is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
WP Call Back is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with WP Call Back Plugin. If not, see <a href="http://www.gnu.org/licenses/" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.
License: GPLv2 or later 
License URI: http://www.gnu.org/licenses/gpl-2.0.html

Quick Contact and Call back widget

WP Call Back, gives you the ability to quickly add a call back widget to the sidebar of your website.

Сallback Samlab widget vs Quick Contact and Call back widget