CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
Paessler PRTG - An advanced network monitoring solution to monitor network up/downtime, traffic and usage.
SiteLock - SiteLock software provides advanced website security, daily security scans, web app firewall with a CDN to deliver content more securely.
MRTG - MRTG (or Multi Router Traffic Grapher) is an open-source network monitoring tool.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
Akamai - Akamai is the leading content delivery network (CDN) services provider for media and software delivery, and cloud security solutions.