Marcus (aka @msykes)

This plugin removes the admin bar completely from the public and admin areas of the website. Can be used either as a normal or MU plugin.
Upon activation/installation this works immediately. Nothing fancy, the admin bar is just not loaded anymore.
<h4>BuddyPress 1.1 Onwards</h4>
You can also add the following to your wp-config.php file and then you don’t need this plugin ( sniff ;( ) :
<pre><code>define( 'BP_DISABLE_ADMIN_BAR', false );
</code></pre>

Remove BuddyPress AdminBar

This plugin removes the admin bar completely from the public and admin areas of the…

Dhiraj Suthar

This plugin is for the site where completely hide the admin bar from fontend side.
When you activated the plugin no one can see the admin bar.
This plugin has just a few lines of code and no settings so you can change as per your need.

Hide Admin Top Bar

Hide the Wordpress admin topbar from fontend side for all the users.

Remove BuddyPress AdminBar vs Hide Admin Top Bar