All of these resources are provided free for personal use. There are many more maps available on my RPGNow and Paizo stores. If you would like to be notified when a new free map is posted, follow me on G+, facebook or twitter.
Free Dungeon Tiles
This set contains images that can be put together to create an infinite variety of dungeons: 14 textures, 10 markers, a full set of wall sections and 180 objects to flesh out any lair. All textures and images are sized to 100px per 5′ square. The tiles can be put together in an image editing program or in a virtual tabletop. They were designed initially for use in maptool but can just as easily be used in other online gametables. The tiles are licensed for use under the Creative Commons license CC-BY-NC-SA.
Free Starter Map Set
This free pack of maps contains all the encounter areas you need for a quick game. Contained in the pack are an encounter outside an inn, a snowy cliff with a cave entrance and a deserted mine as well as a map of the region. These were designed for use in maptool or any other virtual tabletop, with 50px=5′. They are provided free for personal use.
Free City Map
This map was created for the Wayfinder magazine, and are free for use under the Creative Commons CC-BY-NC-SA license:
Free Archipelago Map
This was partnered with this archipelago map, which is also licensed under Creative Commons CC-BY-NC-SA license:
This was initially created for a challenge over on the Cartographers’ Guild, and is CC-BY-NC-SA. If you want to use this in a VTT like Roll20 or maptool, the scale was designed at 50px=5 feet.