Cygwin is pretty good anyway. You can get a complete OpenSSL and OpenSSH suite for Cygwin, and it's works well enough.

If you are adicted to a GUI then PuTTY is pretty good, and includes a nice SSH terminal tool, and a set of batch-able command line tools.

You should also be able to get various SSH tools for Perl from CPAN, but I've not used them, and I don't know if they are easy to get for Windows either.