Palo Alto Networks WildFire - Firewall and Threat Intelligence

CurrentWare BrowseControl - BrowseControl web filtering software blocks websites based on URLs and categories. Policies can be customized for each user, department, or OU. Includes other features such as an app blocker, port filter, and download/upload blocker.

FireEye Security Suite - An enterprise-grade security solution for mid-market customers, combining detection, protection, and response capabilities for network, email and endpoint.

Qustodio - Free parental control software. Monitor and track your child's online activity. Block dangerous sites and protect kids from online bullying.

Zscaler Web Security - Zscaler offers cloud-based web security solutions.

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.