Waze: This free, crowd-sourced turn-by-turn app is still a bit rough around the edges, and it's not going to replace Telenav or Navigos for cross-country journeys. But Waze is working on it: The new version places treasures in areas where their map data is weakest, which you collect like a 3000lb Pac-Man, helping them fill in the blanks. Two things: Since treasures are placed where Waze's map data is sparse, they might occasionally direct you into an earthquake fault; and sadly, there are no ghosts, for obvious reasons. (Like spookiness! And road death.)