LinkHover shows a tooltip at the cursor when you hover a link in chat.
This is a stand-alone version of the popular Prat/Chatter mod. It's extremely light (45 lines of code) and doesn't require any library or chat addon.
It supports the following links by default:
* Enchant / Spell
* Instance lock
* Unit (combat log)
To turn any of those off, open LinkHover.lua with a text editor and delete the appropriate line in LinkHover.show.
1.2 adds support for guild bank log frame.