I got tired of having to open the link dialog in CKEditor in order to check where a link is pointing to, so made this simple plugin.
Link Hover
A plugin for CKEditor. Shows the href attribute of a link in a tooltip when the link is hovered. This saves you from having to open the link dialog in order to check where a link points to.
Installation
This readme assumes installation in ProcessWire CMS.
The plugin folder must be named "linkhover" – if necessary, rename the folder to remove the "-master" suffix added by GitHub. Copy the "linkhover" folder to /site/modules/InputfieldCKEditor/plugins/
In the field settings for each CKEditor field that you want to activate the plugin for, check the "linkhover" checkbox at Input > Plugins > Extra Plugins
https://github.com/Toutouwai/linkhover