I haven't been able to find a screen sharing software where multiple users can share their screen (specifically, an application window) simultaneously while being able to see the other users' shared screens.
It only needs to support two users: user 1 sharing his screen to user 2, and user 2 sharing his screen to user 1.
For example, I tested Zoom, but while Zoom allows sharing multiple screens simultaneously, those users who share their screen can't see the shared screens of the other users (because the Zoom window hides itself while sharing one's screen). If user 1 and user 2 both share their screens, only other users in the meeting (user 3, 4 etc.) can see both screens.
Other screen sharing software solutions that I've found do not advertise this feature. I haven't been able to find any article about this use case either.
I guess I should mention that there is one solution we've found: use two different screen sharing applications simultaneously. For example, user 1 uses Teams to share his screen to user 2, and user 2 uses Zoom to share his screen to user 1. Very cumbersome and performance hungry, though.
72 Answers
"Tuple" is an app on macos for two-way screen sharing and pair programming.
Google Meet supports this. Not sure when it was added, so it may be part of the "new experience" currently being rolled out in June 2021.
You may want to turn off both cameras to improve performance, since you will likely be paying attention to the screens anyway.
