The LBS4all (Location-based services for all) project focuses on providing location-based services for people with mobility problems. In particular, it aims in providing navigational help for three types of users including: older, visually impaired and blind people. LBS4all is designed to exploit new mobile computing, positioning and communication technologies in order to aid navigation around urban environments.
The above screenshot illustrates how a user can navigate using the lbs4all software installed on a windows mobile 5.0 PDA. A digital compass is also used (which is inside the rectangular box) to provide orientation information to the user by updating the position on the digital map.
More information:
http://lbs4all.soi.city.ac.uk/