We take part in a bi-weekly meeting using jitsi. The next meeting, on Nov 21, will use osgeo meeting room: https://meet.osgeo.org/GeoServerMeeting
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(Anonymous access is still fine, only one person needs needs to use OSGeo User ID to start meeting)
For background see: https://jitsi.org/blog/authentication-on-meet-jit-si/
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Jody Garnett