Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Rocket.Chat free open source chat solution.

Mikogo is a desktop sharing software application for web conferencing and remote support.

OpenMeetings is software used for presenting, online training, web conferencing, collaborative whiteboard drawing and document editing, and user desktop shari…

Sneek is a constant presence tool for digital nomads, remote jobs.

Limnu is an online whiteboarding app.

Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Ekiga (GnomeMeeting) is a VoIP and video conferencing application for GNOME and Microsoft Windows.

Bitrix24 is a free (for small businesses) social enterprise platform.

Beamium is an online tool to present and share documents live.

Qiscus provide everything you need to power up your app with chats.

GoMeetNow is an online web conferencing service.