pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Cyberoam - Firewall
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Meraki MX Firewalls - Cloud managed networking from Cisco Meraki. The easiest and most IT-friendly solution for enterprise networking needs.
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.