I use Microsoft Teams #5 - Anonymous Join for Meetings
The feature velocity for Micrososft Teams is amazing.
One of the recent enhancements is that we can now extend a Teams meeting to anonymous participants. This is basically anyone and everyone with an email adress. In my humble opinion, this is a milestone in the history of Team. To support open meetings, we have also delivered the Lobby feature to control external guest access and anonymous attendees can also attend a meeting using a supported browser. Furthermore, we can don't even need plugins to support audio and video.
Check out this Corporate Teams blog for further details.
To help visualise what this all means, I've created a 75 second video to proive an overview: