Adnan Shahid

Responsive preview tool for WordPress admin to switch between mobile, tablet, and desktop viewports inside the dashboard.
Key features 
* One-click viewport buttons (Mobile / Tablet / Desktop) 
* Uses an iframe to preview your site inside the WordPress admin 
* No tracking, no external requests, no background processes
<h3>License</h3>
GPLv2 or later.

Responsive Admin Viewports Preview

Responsive preview tool for WordPress admin to switch between mobile, tablet, and desktop viewports inside the dashboard.

railmedia

Responsive menu based on the Sidr jQuery plugin developed by BERRIART. It features an options panel where the menu can be configured. You can choose between sliding from the left or from the right side of the page, to have a full width bar or a simple button as the menu trigger and more. The menu features two CSS themes: dark and light.
It also adds two sidebars in Appearance -> Widgets, where you can add widgets before and after the menu.

Responsive Admin Viewports Preview vs Sidr Responsive Menu