PuTTY - Popular free terminal application. Mostly used as an SSH client.
JSON Generator - Create mock and sample JSON using a powerful template syntax
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Mockaroo - A realistic data generator to test your app
iTerm2 - A terminal emulator for macOS that does amazing things.
Random Data - Generate random data for testing