OpenSSH is a FREE version of the SSH connectivity tools that technical users of the Internet rely on.

Corkscrew is a tool for tunneling SSH through HTTP proxies.

Alternatives to win-sshfs. win-sshfs is a SSH(SFTP) filesystem made using Dokan and SSH.NET library that allows you to mount remote computers via SFTP protocol like windows network drives.

EldoS - SFTP Net Drive

ExpanDrive - SFTP support

Smylers - SSH Can Do That? Productivity Tips for Working with Remote Servers
mozilla wiki - Security/Guidelines/OpenSSH
GitHub - Stribika - Secure Secure Shell