Mumble is a free voice chat client that uses low bandwidth. Join the DevDungeon Mumble server to voice chat with others. It supports voice activation and push-to-talk controls. You can connect to the DevDungeon server by connecting to the following host.
Download a Client
For Android, you can try Plumble.
Connect to the server mumble.devdungeon.com. Log in using any username that is not already registered or in use. If you do have a registered username you either need the certificate or the password to verify that username.
Register a Username (Optional)
You can log in using any username that is not already logged in. To claim a username, log in like normal, and then from the top menu go to Self -> Register. This creates a certificate that identifies you. After clicking register, you do not have to do anything else. You can back up your certificate by going to Configure -> Certificate Wizard. You can also use the Certificate Wizard to import the certificate on other computers.
If you are interested in writing a text or audio bot for Mumble, read about Writing a Mumble Bot in Ruby.