Big Blue Button (https://bigbluebutton.org https://bigbluebutton.org) is one. We actually used it at work for meetings but it seems they have since pivoted to b

Big Blue Button (https://bigbluebutton.org https://bigbluebutton.org) is one. We actually used it at work for meetings but it seems they have since pivoted to be for more virtual classroom. I agree though, even that would need decent IT talent to setup and maintain.