Detour - Immersive audio walks, now in 17 cities
Visit Sights - Visit Sights offers free suggestions for self-guided sightseeing tours and individual sights around the world.
TripScout - Self-guided city tours from local experts
Wanderlog - Collaborative travel planner with combined itinerary and map
Gesso - Gesso is a creator and publisher of mobile audio tours.
Surprise Me - App with self-guided tours from locals