This addon will show coordinates on the minimap as well as on the bottom of the world map.
Yes, I know there are a million of coordinate addons out there, but none of them did what I wanted or weren't updated. This addon is simple, no configuration needed and has a low imprint. It only shows coordinates and nothing else.
Minimap coordinates are show in the title bar of the minimap:
World map coordinates, both for the player and the cursor, are shown at the top of the world map:
/coordinates worldmap - Enable/Disable coordinates on the world map
/coordinates minimap - Enable/Disable coordinates on the mini map</p>