MacTerm is described as '(was MacTelnet) on OS X is now a complete replacement for Terminal, allowing access to both local and remote applications' and is a Terminal Emulator in the OS & Utilities category. There are more than 50 alternatives to MacTerm for a variety of platforms, including Linux, Mac, Windows, BSD and iPhone. Most alternatives are Terminal Emulators and Shells. The best alternative is PuTTY, which is both free and Open Source. Other great apps like MacTerm are ConEmu (Free, Open Source), OpenSSH (Free, Open Source), PowerShell (Free, Open Source) and MobaXterm (Freemium).
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.
OpenSSH is a 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.
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OpenSSH is a connectivity tool which encrypts all traffic be tween two machines. It's not a terminal emulator.
PowerShell (including Windows PowerShell and PowerShell Core) is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the .NET Framework.
MobaXterm is an enhanced terminal app that brings the advanced features of a Unix-like command-line to Windows. It takes the power of Cygwin and wraps it in a sleek, visual interface that's super easy to use, lightweight and portable.
Terminator enables the user to run and manage multiple terminal emulators side-by-side in the same window. The main focus is arranging terminals in a grid. (Tabs is the most common default method, which Terminator also supports.
Hyper™ is a beautiful and extensible, cross-platform terminal built on open web standards. It provides an elegant command-line experience that is consistent across all supported platforms which includes macOS, Windows and various Linux distributions like Fedora and Debian.
iTerm2 is a replacement for Terminal and the successor to iTerm. It works on Macs with macOS 10.10 or newer. iTerm2 brings the terminal into the modern age with features you never knew you always wanted.