
QuteCom
Open SourceQuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.
Discover best Video Call Linux softwares, apps and websites.
QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.
Qiscus provide everything you need to power up your app with chats.
Psi is a cross-platform powerful XMPP/Jabber client (Qt, C++) designed for the Jabber power users. Psi+ is a development branch of Psi IM XMPP/Jabber client.
Nextcloud is a suite of client-server software for creating file hosting services and using them. It is functionally very similar to the widely used Dropbox, with the primary functional difference being that Nextcloud is free and open-source, and thereby allowing anyone to install and operate it without charge on a private server.
Linphone is a free voice over IP (VoIP) service and SIP client.
Signal is the most scalable encryption tool.
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.