itgoldman

This plugin shows on hover sub menus of recent posts, pages and custom post types. 
It’s a simple no-settings out-of-the-box solution for better productivity when using the wordpress admin.

ITG Admin Hover Menus

Adds direct edit links for your latest posts, pages, and custom post types right inside the admin sidebar flyout menus.

Ryan Hellyer

Adds a very simple Colorbox to your linked images. This plugin is intended as an easy to use alternative to other lightbox / Colorbox 
alternatives. Unlike most other plugins with similar functionality, this one does not have any settings or requirements whatsoever, 
simple install, activate and yer done 🙂
More information can be found on the <a href="https://geek.hellyer.kiwi/products/simple-colorbox/" rel="nofollow ugc">Simple Colorbox plugin page</a>.
<h3>Credits</h3>
Thanks to the following (in no particular order) for help with the development of this plugin: 
* <a href="http://t.co/hCpn8iLgFo" rel="nofollow ugc">Milan Dinić</a> – Added extensive upgrade patch for increasing extensibility 
* <a href="http://arnsteinlarsen.no/" rel="nofollow ugc">Arnstein Larsen</a> – Motivated me to add slideshow support 
* <a href="http://utkar.sh/" rel="nofollow ugc">Utkarsh</a> – Assistance with jQuery bug 
* <a href="http://ronalfy.com/" rel="nofollow ugc">Ronalfy</a> – Suggested I use Colorbox

Simple Colorbox

Description: Adds a very simple Colorbox to your linked images.

ITG Admin Hover Menus vs Simple Colorbox