µTox the lightest and fluffiest Tox client
Dino
Dino is a modern open-source chat client for the desktop.
Spectral
A glossy native [Matrix] client.
Polari
IRC client which enables you to chat with people around world through large chatrooms or via private messaging.
Jami
Share, freely and privately. Decentralized messenger with VOIP.
Fractal
Fractal is a Matrix messaging app for GNOME written in Rust. Its interface is optimized for collaboration in large groups, such as free software projects.
qTox
qTox is a chat, voice, video, and file transfer IM client using the encrypted peer-to-peer Tox protocol.