Christoph Daum

The Plugin adds a simple keyboard shortcut for mac and windows, and allows you to hide or show the adminbar in the frontend, very handy for themes using a sticky navigation. 
It is the smaller brother of my plugin <a href="https://wordpress.org/plugins/apermo-adminbar/" rel="ugc">Apermo AdminBar</a> which contains the same functionality and more advanced features.
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 Toggle

This plugin simple allows you to toggle the AdminBar on and off just with the keyboard.

Marcel Bootsman

Auto Hide Admin Bar makes the WordPress Toolbar disappear – and reappear when hovering the mouse pointer over the top of the browser window. 
You end up with a clean view of your site, and keep having access to the WordPress Toolbar. 
If you have any comments or questions, please use the <a href="https://wordpress.org/support/plugin/auto-hide-admin-bar" rel="ugc">support forum</a>.

Auto Hide Admin Bar

This plugin adds an auto-hide feature to the WordPress Admin Bar or Toolbar.

Apermo AdminBar Toggle vs Auto Hide Admin Bar