MySQL - The world's most popular open source database
Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
code-prettify - Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
SQLite - SQLite Home Page
highlight.js - Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.