rich_

Want a toolbar that stays out of the way? Hover to the corner of the page to get your admin links. 
This plugin was made to enable users to get access to the admin area quickly without the default wordpress 
toolbar. The four corners of the page are configurable via drag and drop settings page.
Please let me know if you have any issues with the plugin or you would like to see additions.

Hot Corners

Replace the WordPress toolbar with configurable hot corners.

Marcel Bootsman

Jan-Willem

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.

Hot Corners vs Auto Hide Admin Bar