Wikipedia
Wayfinder
Wayfinder Systems AB was a wholly owned subsidiary of Vodafone specializing in creating mobile navigation systems for a number of platforms such as Symbian 2nd and 3rd edition, UIQ, Windows Mobile and some other smartphones. An external Bluetooth GPS receiver is required for non GPS enabled phones. On March 12, 2010 it was announced that Vodafone is closing the company and all employees will be let go.
On July 13, 2010 Wayfinder announced that they would open source their software under the BSD 3-clause license. Source code for both the server (with import tools for map data from OpenStreetMap) and client software for various phone operating systems (including Android, iPhone and Symbian S60) is available at GitHub.