Proxmox VE - Proxmox is an open-source server virtualization management solution that offers the ability to manage virtual server technology with the Linux OpenVZ and KVM technology.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Hyper-V - Install Hyper-V on Windows 10
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
VirtualBox - VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as...
iTerm2 - A terminal emulator for macOS that does amazing things.