TeamTalk 4 is a conferencing system which enables a group of people to collaborate and share information. Every member of a group can communicate with other members in real time using both audio and video. All that is needed is a microphone and a web camera.
Denmark
EU
Mycelium (formerly Disclone) is a feature-rich, open source communication app and personal-collaborative hub (drive/notes...).
BelgiumEU
The application is a push-to-talk (PTT) walkie-talkie for consumers and business and available for Android, iOS, Blackberry, Windows Phone, Windows PC, rugged mobile devices and two-way radios.
United States
FranceEU
This simple Matrix client written in Python allows you to send and receive messages and files, verify other devices, and interact with your Matrix account or other Matrix users in many ways. You use it from the terminal (CLI) or integrate it into other simple Python programs.
SadnessChat SadnessChat is a free, real-time chat platform built for real conversations. Whether you're hanging out with friends or building a community, SadLounge has everything you need.
Small program mainly aimed to provide a simple user interface for making VoIP calls with Asterisk PBX (an open source VoIP PBX).
Make video calls to anybody in the world with a private connection. Share the conversation by sharing url.
C3 is a standalone voice and text chat application built specifically for gamers for a better overall gaming experience. Instant setup and easy channel sharing lets players spend more time communicating and less time memorizing port and server information.
United States
FluxCap is an independent desktop client designed to connect seamlessly with the Fluxer network. Built with Electron, it provides a dedicated, fast, and customizable user interface for Windows, taking Fluxer out of your browser and directly onto your desktop.
NetherlandsEU
Facilitates community collaboration through voice, video, and text chat, integrated docs and tasks, configurable channels, roles, and permissions, seamless mobile and desktop access, rapid message reactions, file sharing, and notification controls for groups.
ReaLiveT is a free, elegant and simple tool that helps you to communicate immediately with a group of people. Designed for players who play in an online world. Also, a social network to chat with another people and meet new people around the world.
