There's no need for Cygwin with Babun
Babun is a shell, meaning that it can be used to run many different command-line programs. There are many pieces of Linux software designed to be used with Cygwin, another shell. Some of these are as simple as games, but the difficulty of getting your average shell up and running is a large barrier to entry. This shell makes it very easy, and provides some additional features, to boot. Plus, it's free!