it's good to be able to use use vi in windows so I don't have to use notepad.

It is preinstalled in unix based systems, its also small, user can also install a lot of plugins making vim huge IDE

It's ready to go on linux and mac. Just paste in your dot file and you're straight up and running with your editor set how you like it. If you've never used it, it's worth learning just for fun, too, because it is such a different way of working with text that you'll be amazed by the features.