Next-Generation Intrusion Prevention System (NGIPS) - Cisco Firepower NGIPS (Next-Generation IPS) provides contextual awareness, security intelligence, and advanced threat protection against attacks and malware.

Imperva Cloud Application Security - Deploy your applications and data where you want. When you want. Imperva keeps them secure in the cloud, on premises, and in hybrid clouds.

snort - Snort is a free and open source network intrusion prevention system.

Sucuri - Website Protection, Malware Removal, and Blacklist Prevention

Suricata - Suricata is a high performance Network IDS, IPS and Network Security Monitoring engine.

Incapsula - Incapsula is a Security CDN that makes any website safer, faster and more reliable. 5 minute setup will make a world of difference.