If you do dev work on a remote server this is usually not an option unless you're willing to open half a dozen ssh connections, but then none can communicate with each other easily..

I'm sure iterm2 does a fantastic job doing window/tab management, but I spent almost 5 years working over ssh.

edit - tmux is scriptable too, so you can setup a dev environment using a shell script (I do this, setting up my rails server, console, resque workers, etc, etc).