Open Source BSD Server Monitoring Tools

Pandora OPEN is a high-performance, 100% open-source monitoring ecosystem, born as the independent evolution of the Pandora FMS community branch after version 777. Licensed under GPLv2, it provides a modular and sovereign platform for supervising networks, servers, and applications without commercial dependencies. It features multi-platform agents, remote monitoring (SNMP, WMI, HTTP), GIS maps, and advanced visual dashboards. Entirely maintained by the community on GitHub, it ensures total transparency, technical flexibility, and absolute freedom for system administrators.

The Amenetet Monitoring Service monitors remote services which register with it, heart beats are used in both directions to monitor the health of remote services. Remote services maintain a lease with Amentet and renew that lease regularly. Amentet then pings back to the remote service to monitor its health. Remote Services can monitor multiple objects internally, when "pinged" by Amentet, if any of these objects has disappeared an exception is thrown back with the list of missing objects. Amentet will store events in a local Db which can be viewed using the Web interface and as events occur alerts will be raised which can be sent to SNMP Trap daemon and/or SMTP and/or SMS. The service uses Spring Security Framework for access control and can be configured to use any Authentication Authorization system supported by the Spring Security Framework.

LiMon (Linux Monitor) is a free/open/libre multiplataform real time Linux monitor written in C/C++, and other languages. Monitor of server's relevant aspects, such as services, temperature, CPU, memory and disk usage, etc.

Rembassy is a server monitoring architecture that attempts to be easy to adapt and extend. Includes web interface, flexible and easy APIs to build plugins, historic data of state changes and much more.