NetXMS is an open-source network & infrastructure monitoring and management system capable of operating on extra-large networks with tens of thousands devices.
It’s completely free: no hidden charges or fine print. NetXMS provides technical monitoring with flexible event processing, alerting, reporting and graphing for all layers of IT infrastructure. NetXMS is highly customizable and can easily be integrated with various third-party products.
The system can be managed via web interface, as well as a cross-platform rich client application. NetXMS offers full functionality with Windows and most UNIX systems available on the market.