Oskar Stalberg's City Generator is a fun little application which can automatically create a map of a fictional town, complete with buildings, roads and trees. Is does just what it says on the tin! -Just click on the empty canvas to start generating a city map. You can then watch as urban sprawl starts to spread out from the location where you first clicked. If you don't like any of the gaps in your map you can click on the canvas again to add more buildings and roads to your randomly generated map.
caution! do not use this for navigational purposes!