PuTTY - Popular free terminal application. Mostly used as an SSH client.
AWS Cloud9 - AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
replit - Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
iTerm2 - A terminal emulator for macOS that does amazing things.
Koding - A new way for developers to work.