Zabbix - Track, record, alert and visualize performance and availability of IT resources
ManageEngine Patch Manager Plus - Patch Manager Plus, an all-round patching solution, offers automated patch deployment for Windows, macOS, and Linux endpoints, plus patching support for 350+ third-party applications You can use it to patch computers within LAN and WAN.
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.
WSUS Offline Update - Using "WSUS Offline Update" (formerly known as "ct offline update" or "DIY...
Prometheus - An open-source systems monitoring and alerting toolkit.
PDQ Deploy - Deploy software quickly with PDQ Deploy. It's simple to install just about anything to multiple computers on your network.