Is there a lightweight program (laptop w/2gb ram) - free, or very cheap - that a visually-inclined / math-blind artist like myself can use for this? I'm working on a regional/city map, non-digital at the moment. But I really need a computer to help me out. My brain is twisting into impossible configurations and it's sorta painful. =\ And I haven't gotten to the city part yet. Never done that either. =P