A Classic port of my Vanilla port of WotLK npcscan. Uses the button design and alert sound from npcscan.
Rather limited functionality compared to the Vanilla version since automatic targeting isn't possible.
The scanning method is to use TargetUnit and check for the ADDON_ACTION_FORBIDDEN event. Perhaps the only way to do this in Classic.
There are two commands:
/unitscan lists the active scan targets
/unitscan name adds/removes name to/from the scan targets