David Matthew

Guillotheme chops the front-end (i.e. the head) right off your theme by restricting access to the front-end (specifically, the WordPress-generated front-end permalinks). These are unnecessary in the case of a headless or decoupled set-up, and could potentially confuse non-technical users or other content editors when WordPress is being used headlessly (i.e. purely for its CMS capabilities).
<h3>Features</h3>
<ul>
<li>Designed to complement a headless setup.</li>
<li>Activate the plugin to automatically prevent access to WordPress-generated front-end permalinks.</li>
<li>For logged-in users, redirect back to the source page if the front-end is accessed (e.g. a post preview link within the editor will redirect back to the editor).</li>
<li>Non-logged in users are redirected to the login page.</li>
<li>Optionally use your own custom url for the redirect destination for both logged-in and logged-out users.</li>
</ul>
<h3>Development</h3>
<ul>
<li>Namespaced and object-oriented code.</li>
<li>Adheres to <a href="https://github.com/WordPress/WordPress-Coding-Standards" rel="nofollow ugc">WordPress Coding Standards</a>.</li>
</ul>

Guillotheme

Guillotheme chops the front-end (i.e. the head) right off your theme by restricting access to the front-end (specifically, the WordPress-generated fro …

Edward Caissie

Add a widget area to the footer of any theme by way of the <code>wp_footer</code> action hook. Works just like the widget areas commonly created with code in the functions.php template file. 
* Copyright 2010-2016 Edward Caissie (email : edward.caissie@gmail.com)
This program is free software; you can redistribute it and/or modify 
 it under the terms of the GNU General Public License version 2, 
 as published by the Free Software Foundation.
You may NOT assume that you can use any other version of the GPL.
This program 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 this program; if not, write to the Free Software 
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
The license for this software can also likely be found here: 
 http://www.gnu.org/licenses/gpl-2.0.html

BNS Add Widget

Add a widget area to the footer of any theme.

Guillotheme vs BNS Add Widget