discord (It's time to ditch Skype and TeamSpeak)

All-in-one voice and text chat for gamers that's free, secure, and
works on both your desktop and phone. Stop paying for TeamSpeak
servers and hassling with Skype. Simplify your life.

Discord is only available as a 64bit program. 32bit is unsupported.

If you'd like Discord to continue working after an upstream update
is released, but is not yet available on SBo, add the following to
your user's ~/.config/discord/settings.json file:

"SKIP_HOST_UPDATE": true