Mutify - Use a shortcut on any Mac device to mute your microphone
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Smart Tab Mute - Ensures that only one tab is playing sound at the same time
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
MuteTab - Better tab muting in Chrome
Crisp Chat - Multi-channel customer support software