E2Guardian - Web filtering solution
NxFilter - Best performance. You don't want to slow down your network by installing a network security software. NxFilter is a light-weight DNS filter. It doesn't cause any latency issue in your network.
Qustodio - Free parental control software. Monitor and track your child's online activity. Block dangerous sites and protect kids from online bullying.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
FamilyShield - OpenDNS is the easiest way to make your Internet safer, faster and more reliable. Protect your family across all devices on your home network.
CacheGuard-OS - CacheGuard is an enterprise grade Web Gateway solution offering Web Security & Optimization in the same box. Price starting at $99 per Year!