Here's one you can try that has voice turn by turn, although I have not personally tested it. It does have a free trial though.
Mobium™ is a GPS Systems software that turns a Windows Mobile device into a full navigation system with turn-by-turn, GPS guided.
Getting started couldn’t be easier.
All you need is Windows Mobile smart phone, or a Windows Mobile PDA with internet connectivity.
Mobium™ your GPS navigation system for your Mobile device
Key Benefits to Mobium™ GPS navigation
- Find your destination by turn-by-turn voice driving directions and estimated drive time.
- Find whatever you need in your way by quickly locate and navigate to nearby business such as hotels, restaurants and more from over 15 million points of interest.
- Quickly find lowest Gas Prices locally or along your planned route.
With GeoMicro Mobium™ GPS Navigation System , your Windows Mobile device is turned into an advanced Mobile Navigation System with turn-by-turn voice announcements and detailed driving directions. You can search over 15 million points of interest (POIs) - places like hotels, restaurants, shopping malls and other tourist attractions - then dial the POI's phone number for reservations, hours of operation, or other information. With Mobium™, you never need to be lost again! Getting started couldn't be easier. All you need is a Windows Mobile Smartphone/PocketPC, or a Windows Mobile PDA with internet connectivity. Mobium™ GPS navigation system is downloadable over the air, and installed on the device. While the application works without GPS, we recommend using a GPS I/O Card or Bluetooth GPS Receiver to take advantage of the full power of Mobium™ Navigation Mapping Software.
Map Display & Navigation:
Detailed, high cartographic quality maps that stream down as you navigate, providing an unmatched navigation experience.
See your locations on graphical maps with Latitude/Longitude lines & ZIP Codes, and watch your movements as you go.
Quickly get a map, address, phone number, airport, city or ZIP Code.
Let Mobium™ provide the turn-by-turn voice directions & street names, distance to destination, and estimated drive time.
Driving directions can be viewed either as a detailed turn-by-turn directions list or graphically displayed on the map.
Instant Route feature allows users to quickly define starting point & end point of an arbitrary route and immediately obtain detailed turn-by-turn navigation.
Instant Geo-Coding and Reverse Geo-Coding feature allows users to click on any point on the map and instantly retrieve its Address or Latitude/Longitude information.
Always Up-to-Date POI Database:
Automated POI and map updates, no user intervention is required.
Use Mobium™ anytime, anywhere to quickly locate nearby businesses, and call their phone numbers with one-click access.
Contains over 15 million listings (POI) across North America, choose from restaurants, ATMs, theaters, hotels, shopping malls, and many more.
Powerful Search-Along-Route feature allows users to quickly search for relevant POIs along their current route.
Unique Name + Category Search quickly find any POI, and add POI to your device's Contacts Manager or to Mobium's Favorites List with User-Definable Categories.
Quickly find lowest Gas Prices by fuel-grade/fuel-type locally or along your planned route. Lowest Gas Prices search results can be sorted by lowest price first, shortest distance first, or by a weighted combination of both.
What you need to get started:
Getting started couldn’t be easier.
Download Mobium GPS Navigation and All you need is Windows Mobile smart phone, or a Windows Mobile PDA with internet connectivity:
http://www.mobiumgps.com/
Here is another one that looks as though it will be promising software. However, I'm still awaiting my Beta download to test. Hope it's out soon.
http://www.sygic.com/drive/index.html