Mutify - Use a shortcut on any Mac device to mute your microphone
Smart Tab Mute - Ensures that only one tab is playing sound at the same time
Spotify Ad Blocker - Mutes Spotify (and only Spotify) during ads. Portable, with a minimal UI via tray icon.
Muzzle - Silence embarrassing notifications while screensharing
Smutefy - Smutefy is a small menu bar application that automatically detects and mute Spotify ads
Upscope Screen Sharing for Intercom - No-downloads screen sharing fully integrated with Intercom.