Mumble is an open source, low-latency, encrypted, high quality voice chat software.

You can connect to your Mumble server on the regular Mumble port 64738. Clients to connect to Mumble from your desktop and mobile devices are available.

Desktop Mumble GNU/Linux macOS Windows
Mobile Mumble App Store
Mumblefly App Store
Mumla F-Droid Play Store
Package Mumble
Debian: mumble