The supremely creative design/data experimentalists at Stamen launched Map Stack, a fascinating and super-simple tool to design your own maps and cartographical mash-ups:
You can use it to combine custom cartography, colors, and satellite images into custom, easily modified maps.
We provide access to different parts of the map stack, like backgrounds, roads, labels, and satellite imagery. These can be modified using straightforward controls to change things like color, opacity, and brightness. So within a few minutes you can have a map of anywhere in the world with dark green parks and blue buildings. You can get very precise with image overlays and layer effects, using layers as cut-out masks for other layers. Or just make a regular-looking map in the colors you want.