@cosmin jitsi can still be used, it's still free software, it's just the "meet.jit.si" instance that has changed to require such login. It's a configuration thing, a choice made by whoever runs each instance.
You can setup your own instance, or use one of the many instances that are still open. CCC has a list of instances here, you could pick one of those: https://pads.ccc.de/jitsiliste