https://www.iterm2.com/ Mac only, unfortunately.

I'm not on Mac, unfortunately. I couldn't find anything on the web site showing how the integration happens or works. Presumably it is completely transparent.

I'm a newbie to tmux but I use it with iTerm and I love it. I use my macbook for work but my dev code/servers are on a linux desktop. When I get into work I ssh to my linux box and type "tmux -CC attach" and my tabs all re-open like normal iTerm tabs and my subdivided terminal windows all restore to right where I left them. It's great for leaving all my watches/running code/tailing logs all open and in panes. It used to take me a couple of minutes to re-setup everything when I got into work but now I just run 1 command and I'm back to where I left off.

It's transparent, but doesn't seem to map 100%. Last time I used it a lot of stuff in my tmux config didn't work, like keyboard shortcuts.

There is a branch of Terminator which supports tmux integration.

Link? Google doesn't turn up too much except an old bug report. I switch haphazardly between terminator (sitting at my desk) and tmux (sshing in); I'd love to unify it.

Here's the branch for it:

https://code.launchpad.net/~andfagiani/terminator/tmux

And here's the discussion of it:

https://bugs.launchpad.net/terminator/+bug/1301605

You can see in comment 18 how to use it.