Every map comes in multiple alternate versions. There are GM and PC versions. GM map may include annotations, numbers, key, and secret rooms. PC maps don't have any of this. Also, most maps come with a black and white printer friendly version.
Just recently I will start releasing dungeon maps with no grid (previously grid was drawn and thus not editable). A gridless map is great for games that use no rigid measuring system and also ideal for certain VTT environments.
Become a Denizen of the Tower to get access to over 60 HD maps right now, and more to come each week.