Try
www.pocketfms.com
It is free, however, to receive greatly enhanced detailed mapls, they require a 50 euro donation.
Then you have a continiously updated program with maps and navdata for the whole world, for which no additional fee exists!
Runs on PocketPC as well as PC (laptop).
It is not very intiuitive, but read the manual and you'll do fine.
Regards,
JC
(no, not affiliated, just enthousiastic!)