Lunar.fyi - Control monitor brightness, adapt using the ambient light sensor, adjust volume, switch inputs and turn off displays without fiddling with clunky buttons.
Heartbeat - Listen to music with your friends together, on Spotify
DisplayBuddy - Control the real brightness of your monitors directly from your Mac - no need to touch the buttons on your Monitor.
Liyo - Stream your favorite music live with friends 🎶
Nocturnal - Have more control over your screen at night 🌙
Parallel - Listen to music with friends over Spotify at the same time