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.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Skype for Slack - Move your slack discussions to a group skype call
MyController.org - MyController.org is an IoT automation controller for home, office or any place.
Calls on Slack - Make voice calls in Slack
Calaos - Open source home automation