This simple plugin enhances the default WordPress admin bar by adding a new menus that includes search fields for searching the Codex, wpbeginner.com, WordPress support forums, plugins repository, themes repository etc. Links and search fields to common areas in wp-admin (posts, pages, users, custom post types, plugins, media, settings) are included in the drop down menu when you are not in the WordPress admin area.
If that’s not enough link goodness for you, the plugin now has the option for a custom WordPress menu in the WordPress Admin Bar. (Props to @wpsnipp – http://wpsnipp.com/) If you go to wp-admin/nav-menus.php you’ll see a theme location, “Admin Bar Custom Navigation Menu” where you can attach a custom menu.
Other plugin features: