OpenSSH provides SSH client | server services for Windows environments. The same OpenSSH stack that is defacto elsewhere, is available on Windows clients and servers. Armed with sufficient PowerShell knowledge, one can be rather productive largely from the $SHELL on Windows.
OpenSSH | Windows
Discuss Features Key Generation | Import SSH Client Invalid Key Format Secure Copy (SCP) Client Secure File Transfer (SFTP) Client Port Forwarding OpenSSH Server