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

Shows on hover sub menus of recent posts, pages and custom post types.

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