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.
Firepad - Open source collaborative code and text editing that relies on Firebase for real-time data...
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
CryptPad - CryptPad is a collaborative office suite that is end-to-end encrypted and open-source.
WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing
eduPad - Real-time collaborative text-editor. No account required. Edits highlighted in authors color.