Punkfish

This plugin will auto-hide the new WordPress 3.1 administrator menubar seen when logged in 
and viewing the website.
<h4>FEATURES</h4>
<ul>
<li>Enable/disable auto-hide feature.</li>
<li>Enable/disable auto-loading of jQuery from Google Libraries.</li>
</ul>

Auto-Hide Menubar

Auto-hide the WordPress admin menubar when viewing your website.

Andrea Tarantini

With Menubar you can easily build and manage single and multi-level menus for your WordPress site.
<ul>
<li>
Use as menu items the homepage, the frontpage, a category or a category tree, a static page or a page tree, a tag archive or a tag list, a single post, a search box, or any URL, hard-coded or generated from a code snippet (see [1], [2], [3])
</li>
<li>
To display a menu, use the menubar shortcode or the Menubar widget, or insert a simple line of code in your child theme (see [1])
</li>
<li>
To style your menus, select one of the default Menubar templates, or your own customized template (see [1])
</li>
</ul>
You can browse the documentation pages (below) or use the Live Preview button (top right).
<ol>
<li><a href="https://dontdream.it/menubar/" rel="nofollow ugc">Menubar</a></li>
<li><a href="https://dontdream.it/menubar/menu-builder/" rel="nofollow ugc">Menu Builder</a></li>
<li><a href="https://dontdream.it/menubar/the-menubar-php-type/" rel="nofollow ugc">The Menubar PHP type</a></li>
</ol>

Menubar

Single and multi-level menus for your WordPress site, styled with customizable menu templates.

Auto-Hide Menubar vs Menubar