MediaWiki:Gadget-navigation popups
From Tardis Wiki, the free Doctor Who reference
Navigation popus: Introduces editor-focussed article previews upon hovering over links in articles. These include links and tools aimed at editors. For more information, see Wikipedia:Tools/Navigation popups which is the script that this gadget is an easy way to install. Configuration is available: follow the instructions at Wikipedia:Tools/Navigation popups#Configuration (optional), adding the configuration code to Special:MyPage/common.js (you may need to create the page first). Note that, due to the script being written for Wikipedia, there may be some issue on Tardis.