ZaremTooltip 

A simple and lightweight addon that enhances your Tooltip.

Some features:

• Class and reaction colors
• Item quality colors
• Difficulty colored levels
• Optional mouse anchor
• Instant fade
• Prettier battle pets
• Can hide the Tooltip in combat with shift to show
• Custom unit classifications
• Unit's target
• AFK, DND and DC status text
• Can hide title and realm
• Restyled level and guild lines
• Health is inside the Tooltip
• Can resize the Tooltip
• Hidden spec, faction and PvP text

For options, check the config at the top of the Lua file for your game version (there is no in-game config).
To move the Tooltip, type /zaremtooltip. To enable the mouse anchor, type /zaremtooltip mouse.