This addon adds a "target of mouseover" function to the wow-client (the "mouseover" is the unit who is under your mouse-cursor).
The main advantage compared to Blizzard's built-in function is that you don't need to switch your target to get this information which is much faster, especially in combat and you can still cast spells on your target.
It was originally made to help tanks (therefore the name MTLove -> Main-Tanks-Love) but it may is also useful for any other class.
It provides a frame attached to your mouse and/or a additional tooltip next to the default one.

Visit the project homepage for more information at:
http://randoom.org/?n=Software.MTLove2