Isn't `ssh` the best SSH client in the world, despite the KiTTY's claim? Not to mention, that I'd describe PuTTY/KiTTY more like 'only usable ssh client on windows platform' rather than what they're claiming on their website ;)
Maybe that was true 2 years ago. Now Microsoft is maintaining OpenSSH for powershell and there is Bash for Windows providing direct linux binary support.