Intel NUC - Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Udoo x86 Ultra - Udoo x86 Ultra is a modern PC, known as the most powerful X86 maker board and an Arduino 101 compatible platform.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Raspberry Pi - The Raspberry Pi is a tiny and affordable computer that you can use to learn programming through fun, practical projects. Join the global Raspberry Pi community.
iTerm2 - A terminal emulator for macOS that does amazing things.