Pushover - Real-time notifications on your Android, iPhone, iPad, and Desktop
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Pushbullet - Pushbullet - Your devices working better together
Muzzle - Silence embarrassing notifications while screensharing
Gotify - a simple self-hosted server for sending and receiving messages
Upscope Screen Sharing for Intercom - No-downloads screen sharing fully integrated with Intercom.