Environment Indicator Apr 1st, 2014 This module can make the admin_menu a different color for each environment. Also integrates with Toolbar module (core) and it also works on it's own. :) -Jeff Read more about Environment Indicator
Colorbox Mar 12th, 2014 (updated Mar 22nd, 2014) From the module page, "Colorbox is a light-weight customizable lightbox plugin for jQuery." There are other modules, like Lightbox2, but lately, most people are going with Colorbox, it seems. Read more about Colorbox
External Links Dec 16th, 2013 Make all external links open in a new window. There are optional custom exclude/include filters. Read more about External Links