I also like PureMaps best. Even though WhereWeGo is a really nice alternative, with emphasis on the community, from a product placement/psychological point of view it is a more complicated name, with no noun defining WHAT it actually is, like Maps or Nav(igation) or Drive. It is very easy and intuitive to say "Launch PureMaps and do blah", in contrast to "Launch WhereWeGo and do blah".