MapFactor Navigator is a 
OpenStreetMap 's based free turn-by-turn GPS navigation for Windows, Windows Mobile devices and Android devices.
Maps are installed on the SD card so there is no need for an Internet connection when traveling.
Key features:
Voice guidance
* intuitive voice navigation in different languages
* door to door route planning
* cross-border routing without the need to switch between countries or to a less detailed maps
* overview of the upcoming manoeuvre and distance shown on the screen More Info »
GPS satellite navigation
* 2D/3D mode allows realistic visual maps display
* day/night modes switch colour schemes for day or night time driving
* GPS maps rotate in driving direction, or north up
Searching
* find nearest points of interest
* postcodes
* full GB postcodes (1.8 million)
Speed cameras
* hear audible warnings as you approach speed cameras
Further features
* add your own favourite locations and routes
* routing modes for car, pedestrian, truck
* route avoidance - block off certain road from your route
