Heartbeat - Listen to music with your friends together, on Spotify
WiFi Map - A crowdsourced list of routers and passwords
Liyo - Stream your favorite music live with friends 🎶
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
TuneMeet - Chat with people who are listening to the same song
Instabridge - Crowdsourced free wifi (now on Android)