There are many alternatives to OpenSSH for Linux if you are looking for a replacement. The best Linux alternative is PuTTY, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to OpenSSH and 15 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to OpenSSH are Snowflake (SSH / SFTP client) (Free, Open Source), Mosh (Free, Open Source), SecureCRT (Paid) and WindTerm (Free).
Dante is a product developed by Inferno Nettverk A/S. It consists of a SOCKS server and a SOCKS client, implementing RFC 1928 and related standards. It is a flexible product that can be used to provide convenient and secure network connectivity.
NetCrypt is a small Open Source command line file-transfer utility providing authentication, confidentiality and integrity validation while still maintaining top-notch performance and transfer speed between machines.