Recipe Radar is a World of Warcraft UI addon that assists players in finding recipes. It knows about vendors who sell recipes in the current region or by profession. It has a number of filtering options and can even locate vendors on the world map.
'Uncached Recipe' means you haven't seen the recipe yet.
All for-sale First Aid recipes and their availability.
Main Recipe Radar window set to "radar" mode.
Vendors will also show up on the world map.
The minimap with some mapped vendors.