TeamSpeak is a proprietary Voice over IP software that allows users to speak on a chat channel with other users, much like a t ...

Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full end-to-end encryption that supports prot ...

Mumble was the first and is the most successful and wide spread free and open source software for VoIP. It was the first VoIP ...

Wire is a secure and private messenger for phones, tablets and desktop. Crystal clear voice and video calls, private group cha ...

TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees ...

Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved ...

Telegram is a messaging app created by former VK creators with a focus on speed and security. It’s superfast, simple and free. ...

Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat ...

ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. You can connect to your existing ac ...

Riot (formerly Vector) is an opensource interoperable app running on Web, iOS and Android. It is built around chat rooms, both ...

With the rise of widespread government monitoring programs, Tox is an easy to use application that allows you to connect with ...

Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized ...

Ring positions itself as a potential free Skype replacement Open Source and cross-platform. Ring gives you a full control over ...