You can press CTRL+S in ANY browser to save the work you’re working with, including posts and pages.
Some features:
<ul>
<li>Saves your current work by pressing CTRL+S</li>
<li>Works in all browsers (thanks <a href="http://www.openjs.com/" title="Open JS" rel="nofollow ugc">Binny V A</a>)</li>
<li>No jQuery</li>
<li>Made in Sweden</li>
</ul>

The Saver

This plugins allows you to publish your posts/pages and update your files in the admin panel by pressing CTRL+S.

bradvin

This plugin allows you to easily bookmark/favorite posts, pages and custom post types. When you ‘star’ a post a shortcut link will appear in the admin menu. 
Use this plugin if you constantly find yourself editing the same posts or pages, and are sick of showing the list of posts first, then finding the post, then clicking edit.
Steps to use
<ol>
<li>Go to Pages</li>
<li>Click the Star icon on a page.</li>
<li>Your page is now bookmarked!</li>
<li>Repeat for other pages you always edit.</li>
<li>Save time!</li>
</ol>
Plugin Features
<ul>
<li>Intuitive interface to bookmark posts using a star icon.</li>
<li>Zero settings! Activate and enjoy.</li>
<li>Works with posts, pages and any custom post types.</li>
<li>Dashboard widget listing all bookmarks.</li>
<li>Setting a bookmark is done in realtime with no page reload.</li>
<li>Bookmarks are added to the admin menu for quick access under a “Bookmarks” menu item.</li>
<li>Adds a Bookmarks view/filter to the listing pages.</li>
<li>Bookmark shortcuts are also grouped by post type within the WordPress admin bar.</li>
<li>Optional “Bookmark Title” quick edit field to customize menu labels</li>
</ul>
Filters
<ul>
<li><code>admin_bookmarks_post_types</code> – Filter to scope bookmarks to specific post types</li>
<li><code>admin_bookmarks_untitled_label</code> – Filter to customize the untitled label</li>
<li><code>admin_bookmark_feature-dashboard_widget</code> – Filter to disable the dashboard widget</li>
<li><code>admin_bookmark_feature-quick-edit</code> – Filter to disable the quick edit feature</li>
<li><code>admin_bookmark_feature-view</code> – Filter to disable the view feature</li>
<li><code>admin_bookmark_feature-admin-bar</code> – Filter to disable the admin bar feature</li>
</ul>
To disable a feature, add a small bit of custom code to your theme’s <code>functions.php</code> file:
<pre><code>add_filter( 'admin_bookmark_feature-dashboard_widget', '__return_false' );
</code></pre>

Admin Bookmarks

Bookmark your favorite posts, pages or custom post types within the WordPress admin

The Saver vs Admin Bookmarks