Mumble is VOIP (Voice Over Internet Protocol) software that allows people to communicate in real time. It's a popular privacy-respecting alternative to software such as discord, ventrilo, or teamspeak. I host this public mumble server for my friends and family, but anybody is welcome.
If you have mumble installed, you should be able to click the "Connect" button at the top of this page. If that does not work, here are some additional instructions.>