Push to Talk - Use spacebar to turn mic on temporarily
Nod - Reactions for Google Meet: Allow your participants to raise hands and send emoji reactions. Each participant needs to install it (as well as presenter)
Save Participants - Very easy extension to save a list of participants
Soon to Be Redundant
Will soon not be necessary due to upcoming features
Google Meet Breakout - Create breakout rooms, assign people to them, and move within them.
Google Meet Attendance - VERY Robust addon for recording attendance and connectivity. Maybe too robust?
Background Blur for Google Meet - Does what it says. Crude but effective way to limit accidental sharing of background content!