Cygwin is a collection of GNU and Open Source tools which provide functionality similar to a Linux distribution on Windows.
Cygwin is an extraordinarily powerful set of software for Windows that allows you to use some of the functionality of Linux. It includes a well equipped command line environment, compilation tools, an X server, and more. Follow the Cygwin installation menu to the left for step by step installation of Cygwin, X windows, and more.
Cygwin can be configured entirely with dotfiles - if you’d prefer to go straight to them, you can download them from GitHub. If you have a bit more time, then this site will hopefully help to give you some ideas for your set-up. If you see anything you can do better, let me know in a comment - I’m updating these all these all the time.
The home of the Cygwin project is here, but if you are using it in production, you might want to look at Red Hat’s Cygwin services. Alternately, if you are searching for a quick solution, maybe babun is for you?