Zabbix - Track, record, alert and visualize performance and availability of IT resources
nginx - A high performance free open source web server powering busiest sites on the Internet.
Abusix - Abusix is a network security company that offers email threat protection and network abuse handling solutions to ISPs, Telcos, and Cloud/Hosting Providers to stop the rapidly growing problem of email-borne threats and other kinds of network abuse.
Voxility DDoS Mitigation - DDOS Protection and Mitigation At HostingFuze Network we understand how important uptime is for your sites.
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.