Lansweeper - Lansweeper discovers Windows, Linux and Mac machines in your network.

Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.

GLPI - GLPI is the Information Resource-Manager with an additional Administration- Interface.

M/Monit - Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.

FusionInventory - Fork of the OCS Inventory project that enables users to inventory their IT assets.

LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.