RMMZit
Free, open-source, self-hosted RMM for Windows and Linux computers
...One web console shows the inventory of every Windows and Linux computer, raises alerts (e-mail, Slack, Microsoft Teams, webhook), gives technicians remote desktop and a terminal in the browser, runs scripts and installs Windows updates and Linux packages on a schedule. Agents connect outbound, so managed computers need no open ports, and every command is signed and checked by the agent. Runs as an appliance VM (OVA, qcow2, VHDX, ISO), with an install script or with Docker; 14 languages; AGPLv3, commercial support available from MaxZit.