WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
code-prettify - Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
Wordfence - Comprehensive security plugin for WordPress.
highlight.js - Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.