[@Dynamo Frokane]

This [i]may[/i] be useful depending on how you use it, but may still need some work in Photoshop afterwards to clean it up.
[url=http://maps.stamen.com/#toner/12/37.7786/-122.3808][Link][/url]

I suggest using a city with non English names or using toner/terrain lines + background (combined in Photoshop) to map out a design. If you pick out a small enough town you can do something that looks grander than what it really is.
For example:
[img]http://mike.teczno.com/img/osm-terrain/Eureka-small.jpg[/img]

Aside from that, I haven't found too much yet and I've tried a few times to find a city generator. There may be something out there but a lot of it caters towards D&D designs.