Anyone know of good Linux GPS driving map software?

[pursley1 at netscape.net]

I am looking for advice, as part of my migration from Windows, to find a 
good replacement for my Delorme Street Atlas program, which only runs in 
Windows.  Even though I would prefer to get free open source software, 
due to the dependability I need it to have, I am not ruling out 
purchasing commercial software for Linux if it needs be.  It is for my 
laptop computer for when we need to make road trips.  I have tried a 
number of software packages including Navit and others, which crash 
easily and a lot, but have yet to find one that even has half the 
stability I need.  Any suggestions?

Bradley