PowerShell - Download WMF. Windows Management Framework contains the latest versions of PowerShell, DSC, WMI, and WinRM for older versions of Windows. PowerShell Module Browser. Search for PowerShell modules and cmdlets.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Shadowsocks - A fast tunnel proxy that helps you bypass firewalls
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
V2Ray - A platform for building proxies to bypass network restrictions.
iTerm2 - A terminal emulator for macOS that does amazing things.