PuTTY - Popular free terminal application. Mostly used as an SSH client.
Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
code-prettify - Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
iTerm2 - A terminal emulator for macOS that does amazing things.
highlight.js - Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.