Heartbeat - Listen to music with your friends together, on Spotify
Dapp Store - DappStore is a platform, which lists all popular dApps
Liyo - Stream your favorite music live with friends 🎶
DappRadar - A list of the best decentralised Ethereum applications
Partyhero - Pass your friends the aux!
AppScope - Appscope, one of the leading directories for Progressive Web Apps (PWAs).