nfsen-ng - nfsen-ng aims to be an in-place replacement for the ageing nfsen.
StackPath - Secure Content Delivery Network, DDoS, WAF Service
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Avast - Avast security software products are developed for Microsoft Windows, Mac OS X, Android and Linux users by AVAST Software.
FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.
Flexera Software Vulnerability Manager - Flexera Software Vulnerability Manager provides solutions to continuously track, identify and remediate vulnerable applications.