PuTTY - Popular free terminal application. Mostly used as an SSH client.
TisaneAPI - Detect hate speech, cyberbullying, and more in 27 languages
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
YouTube Kids - YouTube for the youngins on iOS and Android
iTerm2 - A terminal emulator for macOS that does amazing things.
KidsWifi - Simply plug in to protect your kids online