OpenSSH is described as 'free version of the SSH connectivity tools that technical users rely on. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks' and is a very popular app in the file management category. There are more than 50 alternatives to OpenSSH for a variety of platforms, including Windows, Linux, Mac, Android and Android Tablet. The best alternative is PuTTY, which is both free and Open Source. Other great apps like OpenSSH are KiTTY, Windows Terminal, ConnectBot and Muon SSH/SFTP client (formerly Snowflake).
OpenSSH is mainly a Terminal Emulator but alternatives to it may also be SSH Clients or Shells. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of OpenSSH.
PuTTY is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port.
PuTTY vs OpenSSH opinions
Most users think PuTTY is a great alternative to OpenSSH.
Harty1978 A good way to do it on Windows until OpenSSH for Windows catches up
ConnectBot is a Secure Shell client for the Android platform. Its ultimate goal is to create a secure connection through which you can use a shell on a remote machine and transfer files back and forth to your phone.
Terminal (also referred to as Terminal.app) is a terminal emulator included in Apple's Mac OS X operating system. It originated in Mac OS X's predecessors, NEXTSTEP and OPENSTEP, and allows the user to interact with the computer through a command line interface.
Mosh (mobile shell), the mobile SSH replacement. Remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line editing of user keystrokes.
SecureCRT combines rock-solid terminal emulation with the strong encryption, data integrity, and authentication options of the Secure Shell protocol. SecureCRT provides secure remote access, file transfer, and data tunneling for everyone in your organization.