Yac - Take your time back from Zoom & Slack
Beseda - Async video and audio messaging for remote teams
Echoes - Voice-first messaging for fast & collaborative remote teams
Slack - A messaging app for teams who see through the Earth!
WebRTC - WebRTC is a free, open project that enables web browsers with Real-Time Communications (RTC) capabilities via simple JavaScript APIs. The WebRTC components have been optimized to best serve this purpose.
SuperNormal - Async video updates for remote teams