PuTTY - Popular free terminal application. Mostly used as an SSH client.
Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
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.
iTerm2 - A terminal emulator for macOS that does amazing things.
AES Crypt - AES Crypt is an advanced file encryption utility that integrates with the Windows shell or runs from the Linux command prompt to provide a simple, yet powerful, tool for encrypting files using the Advanced Encryption Standard (AES).