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.

gilles66

Need to know which template is used by WordPress to display your pages in the front office ? 
This plugin simply does this.
Show the name of the php file of your theme used to display the current page.Need to know which template is used by WordPress to display your pages in the front office ? 
This plugin simply does this.
Efficient and very easy to install, it will show you in the admin bar the name of the php file currently used to display the current page. 
The color of the text is different regarding the origin of the template(the theme, a parent theme, or a plugin) 
(icon author :http://www.megaicons.net/iconspack-1096/45043/)

which template file

Show the name of the php file of your theme used to display the current page.

Apermo AdminBar vs which template file