Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
OpenWrt - OpenWrt is an open-source firmware based on Linux for wireless routers
nginx - A high performance free open source web server powering busiest sites on the Internet.
MikroTik RouterOS - The main product of MikroTik is a Linux-based operating system known as MikroTik RouterOS.
vCenter Server - IaaS platform for managing and deploying virtual machines
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more