Another reminder: Jitsi Meet

https://github.com/jitsi/jitsi-meet

Try it here: https://meet.jit.si/

It's a modern, WebRTC-based replacement for Skype, Google Hangouts and other video/audio conferencing solutions.

And it's great. The company I work for is now using it exclusively for meetings and telepresence. The echo cancellation is outstanding and you can even connect it to a SIP server. No client is required besides Google Chrome or Firefox. There's nothing that comes close to it in terms of sophistication and quality.

It works well for one-on-one and audio calls.