highlight.js - Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.
prism.js - Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind.
Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
Shiki - A beautiful syntax highlighter based on TextMate grammar, accurate and powerful.
Apache Archiva - Apache Archiva is an extensible repository management software.
starry-night - This package is an open source version of GitHubโs closed-source PrettyLights project (more on that later).