Is there a way to run command line tools as a separate app, so I can easily switch between them with apple+tab etc? I want this for things like a mail and irc client where I don't want to hunt down the terminal window to access them. Something like http://www.fluidapp.com but for the terminal.
You can open separate instance of Terminal.app with
You'll have separate icon on the Dock also. However You'll not be able to distinguish them in ⌘ cmd+⇥ tab because they are going to be called simply "Terminal" and have the same icons.
appify seems to be what you're looking for…