Can't go wrong with Vim either... http://www.vim.org/
Dunno about a shell emulator though..

From: "Alan Dayley" <adayley@adtron.com>
> Lately I have been spending almost all of my professional time developing
> on windows.  I miss some of the Linux tools I am learning to enjoy.  I
know
> some of these tools, like grep, vi, emacs, etc. are available for windows,
> I just don't remember where to go get them.  Any pointers before I hit the
> search engines?
>
> Also, isn't there a UNIX/Linux command line emulator or something like
that
> for windows?