nginx - A high performance free open source web server powering busiest sites on the Internet.
FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.
FortiDDoS - FortiDDoS achieves superior & faster DDoS protection from known and zero-day attacks with low latency. Advanced DDoS protection for enterprise data centers.
Arbor - Easily manage product development
DataDome - DataDome provides innovative technology and human expertise to block bad bots.
Corero - Real-time, high-performance, automatic DDoS attack protection, on-premis and in the cloud, with comprehensive attack visibility, analytics, reporting.