The MikroTik Router will replace your hardware router and will provide more functions at a fraction of cost. Firewall, Wireless, Routing and VPN are just a few of the functions it provides.
Secure Bytes provides Secure Cisco Auditor, which is a state of the art Next Generation network security auditing software for Cisco firewalls, routers and switches along with different Router audit tools and Network security Software.
Free Enterprise Trustix Firewall - A fully-featured packet-filtering router, with capabilities including the intuitive Xsentry graphical user interface (GUI) for visualizing and editing the firewall policy and behaviour.