Yac - Take your time back from Zoom & Slack
Dropbox - Online Sync and File Sharing
Echoes - Voice-first messaging for fast & collaborative remote teams
Mega - Secure File Storage and collaboration
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.
Google Drive - Access and sync your files anywhere