Checkmk Raw Edition: Open Monitoring with Enterprise DNA Checkmk Raw Edition is the free, open-source core of the Checkmk monitoring platform — a modern take on Nagios-based infrastructure monitoring. Built around the Nagios engine but extended with a faster UI, smart autodiscovery, and thousands of plug-ins, it offers serious functionality for those who prefer to host everything on their own terms.

It’s not a simplified version — Raw Edition is powerful enough for real deployments, as long as

Xitoring Agent: Lightweight Monitoring for Cloud and On-Prem Systems Xitoring Agent is the small piece of software behind the broader Xitoring monitoring platform — a modern alternative to legacy tools like Zabbix or Icinga. Designed for sysadmins who want real-time server metrics, service checks, and alerting without managing the entire backend themselves, the agent connects systems to Xitoring’s centralized dashboard with minimal setup.

Whether you’re monitoring a cloud VM or an internal file

PA Server Monitor Free: Local Monitoring for Windows-Centric Networks PA Server Monitor Free Edition is a no-cost version of Power Admin’s monitoring suite, built for IT environments that want visibility into their servers and infrastructure — but don’t need a full-scale enterprise monitoring solution. It’s lightweight, easy to install, and offers just enough to cover key systems and metrics on small networks.

For Windows-focused sysadmins who want to track CPU, disk, services, uptime, and SNMP

Open-AudIT: Inventory and Discovery Without the Guesswork Open-AudIT is a network inventory and asset discovery tool designed to answer a simple question: what’s on the network, and how’s it configured? For sysadmins managing diverse environments, it provides a clear, structured view of every device — hardware, software, OS, users, services, shares, and more — without having to install agents.

It’s built for Windows and Linux networks and is especially useful in environments where unmanaged sys