TripIt - TripIt is a travel app that creates a master itinerary to organize all of your plans for your vacation or work trip in one spot.
Spotify - Map shows when two people play same song at same time
Roadtrippers - The ultimate road trip planner to help you discover extraordinary places, book hotels, and share itineraries all from the map.
SOUNDS - Discover music with friends
WorldMate - WorldMate is a travel app that helps individuals plan and organize trips. The app is available for Android and iOS mobile devices, and it is free to download and use.
Songlink - Share music with anyone.