bttn - Press the bttn & Magic Happens™ (internet connected button).
Smart Tab Mute - Ensures that only one tab is playing sound at the same time
flic - Bluetooth Button - Control you smartphone with this wireless button!
Mutify - Use a shortcut on any Mac device to mute your microphone
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Spotify Ad Blocker - Mutes Spotify (and only Spotify) during ads. Portable, with a minimal UI via tray icon.