qTox - A Qt graphical user interface for Tox.
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.
Tox - Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
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Toxic - Toxic is a client with an ncurses interface, written entirely in C.
WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing