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 KiTTY opinions
The original tried and trusted.
The differences are minor. Both are great tools.
Tabby is an infinitely customizable cross-platform terminal app for local shells, serial, SSH and Telnet connections.
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.
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.
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.
Kitty ( not to be confused with KiTTY ) is a powerful, cross-platform GPU-based terminal emulator. It offloads rendering to the GPU and uses OpenGL for fast, cross-platform performance with built-in tiling layouts as well as graphic, unicode...
Guake is a top-down terminal for Gnome (in the style of Yakuake for KDE, Tilda or the terminal used in Quake). Guake is already package by a number of distribution (among them are Fedora, Debian, Ubuntu or ArchLinux).