Summary
Sergey Okhapkin's port of SSH1 Version 1.2.26 is, in our experience, the best Windows port of SSH1 available. It provides a workingssh1, scp1, and ssh-keygen1, sufficient for a typical SSH environment; and as a bonus, sshd is available as well. Be aware that 1.2.26 isn't the most recent version of SSH1, however, so it may have security issues that are fixed in later official versions.