Our website provides a free download of Nagios Core 4.1.1. Nagios Core lies within Internet & Network Tools, more precisely Network Tools. This software is an intellectual property of Nagios Enterprises, Inc. Our built-in antivirus checked this download and rated it as virus free. The most popular versions among Nagios Core users are 3.3 and 3.0.
From the developer:
Nagios Core is the industry standard, Open Source IT monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.
Nagios Core serves as one of the foundation blocks of Nagios XI - our commercial monitoring solution.
You may want to check out more software, such as CORE Utility Billing, Core IQ Builder or Windows 10 IoT Core Dashboard, which might be related to Nagios Core.