Partyhero - Pass your friends the aux!
Witch - Welcome to the world of W. i. t. c. h.
Heartbeat - Listen to music with your friends together, on Spotify
Contexts - Switch between application windows effortlessly — with Fast Search, a better Command-Tab, a Sidebar or even a quick gesture. Free trial available.
TuneMeet - Chat with people who are listening to the same song
Hyperswitch - HyperSwitch provides a compelling alternative to HyperDock for keyboard junkies. What's New