Sana Azmeh

Save your important posts, so you can return to them at any time and read or view them again.
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<li>
To add post to your list press Fave it button, then add tags and press enter
</li>
<li>
To remove post from your list press Unfave it button
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You can style the button as you want or it gets the default style matching the template
</li>
<li>
To add post to faves list use shortcode [myfaves-add]
</li>
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You can add the shortcode in sidebar or footer widget or below header.
</li>
<li>
To list the faves use shortcode [myfaves-list]
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To list faves tags or collections use shortcode [myfaves-tags]
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Fave tags links will list posts related to specific tag for logged in user
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</ul>

My Faves for WP

Save your favorite posts, add tags, and list them.

CodeAndReload

Allows admins other users with a specially-defined user-capability to define a custom menu on the admin-bar of his or her favorite shortcuts.
<h3>Support</h3>
Technical support for this plugin will be provided via the WordPress plugin forum. Additional support may be 
available at <a href="http://www.codeandreload.com/wp-plugins/admin-bookmarks/" title="Admin Bookmarks at Code
and Reload">plugin’s homepage</a>.

Custom Admin-Bar Favorites

Allows admins other users with a specially-defined user-capability to define a custom menu on the admin-bar of his or her favorite shortcuts.

My Faves for WP vs Custom Admin-Bar Favorites