Drew Jaynes

Usher brings Gmail-like keyboard shortcuts for navigating around the various core pages of the WordPress admin.
Additionally, it includes a robust API for registering new global and screen-specific keyboard shortcuts.
To register new shortcuts, use the Usher\register_shortcut() function. For example:
Add a shortcut for the EDD Dashboard
<pre><code>Usher\register_shortcut( 'g d', array(
 'label' => __( 'Navigate to the EDD dashboard', 'textdomain' ),
 'url' => 'edit.php?post_type=download',
 'cap' => 'manage_shop_settings'
) );
</code></pre>
Add a shortcut for the Jetpack Dashboard
<pre><code>Usher\register_shortcut( 'g j', array(
 'label' => __( 'Navigate to the Jetpack dashboard', 'textdomain' ),
 'url' => 'admin.php?page=jetpack',
 'cap' => 'manage_options',
) );
</code></pre>

Usher

Adds keyboard shortcuts for navigating around the WordPress admin.

Evan Mullins

Add shortcut links to the admin toolbar to the index pages listing all content types and other helpful locations you may find yourself constantly navigating to. This plugin brings these links one click closer. It will link to the index or list pages in the WordPress backend for posts, pages, all custom post types as well as the widgets page, the menu page and the users page.
Saved clicks = saved time!

Admin Toolbar Content Links

Add shortcut links to the admin toolbar to the index pages listing all content types.

Usher vs Admin Toolbar Content Links