Slack - A messaging app for teams who see through the Earth!
Houseparty - Brining empathy to online communication.
Pluot Communications - Big-screen video conferencing for startups
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Arvia for Slack - Start quick video calls in Slack channels.
Rume - Video chat that doesn't feel like work