Cinny Desktop

Robrix: a powerful multi-platform Matrix chat client written in Rust, using the Makepad UI toolkit and Robius platform abstractions

Control your desktop from a browser, with P2P chat, file sharing, voice, video, and screen sharing powered by WebRTC.

A modern, open-source, and free voice chat overlay for Discord that supports Mac, Linux, and Windows

Kahla is a cross-platform business messaging app. Mirror of https://gitlab.aiursoft.com/aiursoft/kahla

Hylki (formerly Vireo): a fast, GNOME-native email client built with Rust and libadwaita.

Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc.