Christoph Daum

This plugin enhances the AdminBar and adds links to development, staging and live version of your website, furthermore it allows you to choose a color scheme of your AdminBar for all users on a website, including the frontend. 
You also have to option to control the robots.txt visibility settings, in the newest version you get a watermark for posts that are in draft or scheduled, and a keyboard shortcut to hide the adminbar.
If you want to participate in the development <a href="https://github.com/apermo/apermo-adminbar" rel="nofollow ugc">head over to GitHub</a>!

Apermo AdminBar

Every professional WordPress developer should have at least two environments when working on projects: development and production. But how often do you find yourself lost in these environments? @apermo done a great job solving this issue with this plugin. 

Conclusion: I can highly recommend this fantastic plugin!

Fantastic plugin!

This plugin helps tremendously if you want to switch between different versions of the website. (Staging, dev, live, etc.) 

Thank you!

Good Helper

This plugin allows you to add links between a development, staging and live version of your website, and adds them to the AdminBar.

Linesh Jose

This is a simple plugin for adding custom nav menus to your WordPress Adminbar. Please note this: Custom Adminbar Menus plugin is only compatible for WordPress 3.3 or above versions. Please update your WordPress if you’re using an old version. Watch <a href="https://bit.ly/2kU1HO5" rel="nofollow ugc">this video</a> for more details or visit https://linesh.com/forums/forum/plugins/custom-adminbar-menus/ for support.
Features
<ul>
<li>WordPress Multisite Compatible.</li>
<li>More WordPress admin shortcut links under “Site Menu” & “Add New” sections. <a href="https://wordpress.org/plugins/custom-adminbar-menus/screenshots/" rel="ugc">Screenshot 2 & 3 </a>.</li>
<li>Easy to use.</li>
</ul>

Custom Adminbar Menus

This is a simple plugin for adding custom navigation menus to your WordPress Adminbar.

Apermo AdminBar vs Custom Adminbar Menus