[sktrdie]

Doesn't GNU Screen support this out of the box?

[otoburb]

I believe GNU Screen supports mirror mode (read-only) and pair mode (one shared cursor), but rogue mode (two independent cursors, shared terminal) is the real differentiation from GNU Screen.

Great for remote teams who are heavily command-line based (developers and deployment folks).

[qznc]

Can tmux give two client the same window, but different panes? This means they can see each others cursor on another part of the window.

[cldwalker]

Yep. Pair and rogue mode