ProxySQL - ProxySQL: high-performance, GPL licensed MySQL proxy. It supports hundreds of thousands of concurrent connections and can be multiplexed to hundreds of servers.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Gonarch Tech - MySQL High Availability as a service
nginx - A high performance free open source web server powering busiest sites on the Internet.
PostgREST - Automatic REST API for Any Postgres Database
vCenter Server - IaaS platform for managing and deploying virtual machines