"Waze Inc. has officially launched Waze, a free turn-by-turn GPS application, for Windows Mobile. Waze is a social network for motorists to not only provide driving directions but also offer information collected from the users to identify traffic congestion, road hazards and other conditions that affect travel."
If your WinMo phone has a GPS chip and you are looking for a free turn-by-turn program, this could be just the ticket. Just be aware that it supports a very limited number of phones.