Luke Gedeon

The default position for the menu in WordPress 2.7 is on the left, but since the scroll-bar is on the right, some people wanted the menu over there too. Plus a lot of blogs/websites have menus on the right so menu on the right seems to be a pretty popular option.
This plug-in moves WordPress admin menu to the right side of the screen.

Admin Menu on Right

Moves WordPress admin menu to the right side of the screen.

Eliot Akira

Admin Menu Post List adds a simple post list in the admin menu for easy access. It supports posts, pages, and custom post types.
In the normal admin menu, when you’re editing a post and wish to go to another one, you have to click on All Posts, then select a post — or have All Posts open on another browser tab. With the Admin Menu Post List, you can just select the next post to edit, direct from the menu.
<ul>
<li>Install and activate the plugin</li>
<li>Go to Settings->Post List, enable post types and options</li>
</ul>
A post list will be added to the bottom of each corresponding post type’s menu. You can see it by hovering over the menu item, or when the item is open. The current post is shown in bold, draft/pending posts are in italics, and child pages are listed under the parent.
<h4>Options</h4>

For each post type, you can limit the number of items to display: for example, the five most recent posts.
You can choose to order the post list by:
<ul>
<li>Created date</li>
<li>Modified date</li>
<li>Title</li>
<li>Menu order</li>
</ul>
And the direction of the order:
<ul>
<li>ASC – ascending – alphabetical (1, 2, 3; a, b, c)</li>
<li>DESC – descending – new to old (3, 2, 1; c, b, a)</li>
</ul>
By default, they are set to display from most recent to older posts.
Also, you can choose to display only published posts, and exclude those with future, draft or pending status.
Global settings:
<ul>
<li>Limit title length – Trim the title by number of characters</li>
<li>Hide child posts</li>
<li>Include non-public post types</li>
</ul>
<h4>Recommended</h4>

<a href="https://wordpress.org/plugins/wider-admin-menu/" rel="ugc">Wider Admin Menu</a>
<h4>Note</h4>

There is a plugin called <a href="https://wordpress.org/plugins/intuitive-custom-post-order/" rel="ugc">Intuitive Custom Post Order</a>, which lets you order posts by drag and drop. If it’s installed, it overrides the post order settings in the admin menu also.

Admin Menu on Right vs Admin Menu Post List