Does exactly what it says it does.

Anchors world cursor and hotbar cursor tooltips to the mouse, with a minor offset of personal preference.

For Mists of Pandaria Classic [50500]

Copy the included folder to your Classic Era AddOns folder:
...\World of Warcraft\_classic_\Interface\AddOns\Place Tooltip On Cursor

Warning

Make sure not to copy the top-level "Place-Tooltip-On-Cursor-1.x.x" folder if downloading the source code .zip