ehsan4php

With Contact Form active under Jetpack (1.3 or higher) this plugin will add a 
new option in the “Feedback Management” area to reply to each message sent.
When a visitor send an email using the Contact Form, the message is sent to 
email of the site’s owner as well as stored under “Feedback Management” area. 
This plugin lets users to reply directly from WP Admin using nice text editor.
The emails are sent in HTML format and user can change the name and email 
address the mail will be sent from.

Feedback Extended

This plugin requires Jetpack 1.3 or up with Contact Form plugin active. This plugin will enable users to reply to feedbacks from the admin panel.

Rincelau02

Amelia is an Enterprise-Level WordPress Appointment Booking Plugin, allowing to manage multiple services, employees, customers, business locations, analyze business performance, and accept online payments through PayPal and Stripe. Built by an award-winning team of UX/UI designers and developers. You can download there plugin here <a href="https://wpamelia.com/admin-calendar/" rel="nofollow ugc">https://wpamelia.com/admin-calendar/</a>
This Adds on for Amelia plugin that added a shortcode for the calendar in the backend to be usable to the frontend. Once install use this shortcode [amelia_calendar]

Amelia Shortcode Extended

This Adds on for Amelia plugin that added a shortcode for the calendar in the backend to be usable to the frontend.

Feedback Extended vs Amelia Shortcode Extended