ircf

This plugin provides the following features :
<ul>
<li>A [fullcalendar] shortcode with custom parameters to be inserted in your pages/posts</li>
<li>An admin page where you can define a custom HEAD and BODY template for the [fullcalendar] shortcode</li>
<li>By default FullCalendar 3.4.0 JS+CSS is loaded locally, your can change the version and/or load from cdnjs by setting the HEAD template (WARNING : Setting the HEAD template will remove the default FullCalendar JS+CSS loading)</li>
<li>A default BODY template to display a Google Calendar (just fill in your API KEY and your Google Calendar ID)</li>
</ul>

FullCalendar

Display and customize one or many Google calendars. A non-official WordPress plugin for the (https://fullcalendar.io/) Open Source project.

Cerzky

FullCalendarJs allows you to save multiple XML feeds into a calendar id and display those calendar’s as if they were one. 
The plugin works specifically off of a jquery plugin. The Jquery plugin is written by Adam Shaw. This plugin is lightweight 
 and is designed for ease of use and simplification. Why bloat your own database with calendar events when you can fetch 
 them all from Google Calendar.
More features to come.
Settings Page: 
* Settings > Full Calendar Settings
Shortcode: 
* [fcal id =”1″] //shows calendar of id 1 in the page or post

Full Calendar Js

Display multiple Calendar XML feeds into a jquery calendar. Works with Google Calendar and others.

FullCalendar vs Full Calendar Js