Mutify - Use a shortcut on any Mac device to mute your microphone
Dead Simple Screen Sharing - Simple screen sharing and audio conferencing software.
Smart Tab Mute - Ensures that only one tab is playing sound at the same time
Muzzle - Silence embarrassing notifications while screensharing
Spotify Ad Blocker - Mutes Spotify (and only Spotify) during ads. Portable, with a minimal UI via tray icon.
Surfly - Simple, Fast, and Secure Co-browsing