Privacy is one of the most basic human rights. When we talk to our loved ones at home, usually no one will hear us. But when we cross geographical barriers and chat through chat software, there may be someone who has been listening. When things go from offline to online, this kind of change that makes everyone uncomfortable should not happen. We should be thankful that many people are fighting for this right for themselves, and that Signal can be an important tool to maintain our privacy online.

TeamTalk is a free and open-source multi-user conferencing system for Windows, Mac, Linux and mobile platforms, developed by Bjoern D. Rasmussen from Denmark. It allows user to perform real-time voice and video communication through Internet. For voice encoding, it uses the Opus and Speex audio codecs; for video streaming, it uses the WebM video codec.

Jitsi (AKA: Jitsi Desktop, formerly called SIP Communicator) is a powerful, scalable, secure (using the SIP/RTP/SRTP/ZRTP encryption algorithms), high-quality and community-driven VoIP/video conferencing/instant messaging application from France, written in Java. It's free, open-source, cross-platform (across Windows, Linux, Mac OS X desktop platfroms and Andrjoid, iOS mobile devices), multi-protocol and multi-user on use and allows to be made secondary development.

Why do we need to publish a post about this kind of web chatting app? After all, there have been too many video chat programs, such as ICQ, Pidgin, Miranda, Skype, TeamViewer, etc. Because sometimes we need to ensure that the communication is more privacy and exclusive (undisturbed), secure enough, and we can enjoy that anytime and anywhere.