glutaminefree

This plugin implements the toolbar for more comfortable post controls. You can enable/disable it from “Screen Options” panel.
Also you can use hotkeys:
<ul>
<li>Save/update post – Ctrl + S</li>
<li>Delete post (move to trash) – Ctrl + D</li>
<li>Change status of post – Ctrl + 1</li>
<li>Change visibility of post – Ctrl + 2</li>
<li>Show revisions – Ctrl + 3</li>
<li>Change data of post – Ctrl + 4</li>
</ul>

Post Editing Toolbar

This plugin implements the toolbar for more comfortable post controls.

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.

Post Editing Toolbar vs Auto Hide Admin Bar