Nagios Core - Nagios Core is a fastest-growing IT Infrastructure monitoring and alerting solution that is created for all sizes of businesses.
The Dude - MikroTik is a Latvian company which was founded in 1996 to develop routers and wireless ISP systems. MikroTik now provides hardware and software for Internet connectivity in most of the countries around the world.
Exoprise - Exoprise provides Digital Experience Monitoring for enterprise SaaS applications like Microsoft 365, Salesforce, ServiceNow, Active Directory, SSO, Okta, Box, and more!
Catchpoint - Catch issues before they impact your business
Pandora FMS - Pandora FMS: Opensource monitoring software
Infovista - Infovista is a network performance management system that test network, automate network operations, and control the enterprise edges easily and quickly.