WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Wordfence - Comprehensive security plugin for WordPress.
Google Cloud Functions - A serverless platform for building event-based microservices.