[lima]

We use the open source Jitsi Meet tool[1], hosted on our own infrastructure with no third party in-between.

Screen sharing is a bit unstable, but conferencing is rock-solid. It's connected to our phone system so people can call in and out [2].

[1]: https://github.com/jitsi/jitsi-meet

[2]: https://github.com/jitsi/jigasi