Zabbix - Track, record, alert and visualize performance and availability of IT resources

Netumo - Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

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.

AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.

FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.

RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems