[TomFrost]

This is worth a little more elaboration, I think. If you compile the iTerm2 version of tmux provided on the iTerm2 website (a merge of the fork into tmux proper is pending), then you can link iTerm2 natively to a tmux session.

This means that the iTerm2 window size is the tmux window size; tabs in iTerm2 are tabs in tmux. Horizontal and vertical window splits in iTerm2 are the same in tmux too. And all of this is bound to the GUI, so resizing/reordering panes with your mouse makes the proper modifications in tmux. And because this is a 1:1 mapping of functionality, others using the same native integration will see tabs and split panes get added and removed in real time, as someone on another machine does it.

It's still in early stages and definitely not bug-free, but this is absolutely the best multiplexing experience I've found. Unfortunately, because this is specifically for iTerm2 right now, it's not cross-platform.

[rogerbinns]

I would love it if gnome-terminal did the same thing. It should be possible to do the whole tmux thing without having to know any keystrokes, configuration etc and just use your existing gui terminal program.