FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Ninite - Ninite is the easiest way to install software.
iTerm2 - A terminal emulator for macOS that does amazing things.
Beyond Compare - Beyond Compare allows you to compare files and folders.