Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
Now UI Kit - A beautiful Bootstrap 4 UI kit. Yours free.
code-prettify - Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
Bots UI Kit - Fully customizable Sketch UI Kit for Messenger Platform
highlight.js - Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.
Landing UI Kit - Handcrafted UI components for landing pages