Volkan Kucukcakar

Show WordPress toolbar (formerly admin bar) with a login button on front end for remembered (previously logged in) browsers. Miscellaneous show/hide/remember toolbar options.
Features: 
* Force display toolbar and adds “Login” button and “Forget Browser (Hide)” buttons to front end on remembered browsers. 
* Remember browser timeout option (cookie expire timeout) 
* Remember user option (user roles support) 
* Options to show or hide toolbar separately for logged in and logged out (but remembered) users. 
* Uninstall option to remove plugin settings on plugin deactivation

Toolbar Login Button

Show Wordpress toolbar (admin bar) with a login button on front end for remembered (previously logged in) browsers. Misc. show/hide/remember options.

CiaranG

This is a very simple plugin to hide/show the WordPress toolbar in the 
front-end of the site, while leaving it alone in the admin section.
The toolbar is hidden by default, and clicking ‘Show’ in the top left 
makes it appear. It can be hidden again by pressing ‘Hide’.
The plugin was inspired by the originally excellent but now abandoned ‘Admin 
Bar Minimiser’ plugin written by 
<a href="http://www.presscoders.com" rel="nofollow ugc">David Gwyer</a>. The javascript 
and css styles used by this plugin are based on that code, but aside 
from that this plugin is a much more limited (and lightweight) 
implementation of the concept. There are no settings, no ability to 
minimise in the admin screen, and no other frills. The main reason to use 
this plugin instead of ‘Admin Bar Minimiser’ is that this works with sites 
that can use SSL, and that one doesn’t.

WP MiniBar

Hide/show the WordPress toolbar in the front-end.

Toolbar Login Button vs WP MiniBar