After VoiceActivator tweak here is yet another interesting Cydia app, “Turn By Turn Navigation” app which will be hitting cydia store very soon. The developer & iOS hackers with handle thezimm & InfectionFX are working on this tweak which will bring turn by turn navigation to iPhone Map App & clubbed with VoiceActivator you can enjoy true voice based turn by turn navigation with your iPhone.
No info about price or release date available at the moment, but here is demo video of turn by turn navigation tweak for iPhone for your viewing pleasure,
Native Turn by Turn Navigation Tweak for iPhone
Source : FunkySpaceMonkey