Free maps

I know i could pay $10 to the forest service but... i like the free open source type stuff, so i was wondering where i might be able to find good maps, free to download.

My other question is on gps topo software, mainly on if the programs show established trails or not.

Thanks for the help,
ran

i answered my own question, with the topo software part...

all maps are free to download:
http://topomaps.usgs.gov/

Libre Map Project