MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Zabbix - Track, record, alert and visualize performance and availability of IT resources
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
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.
Cygwin - Cygwin is a set of tools that provide Linux and POSIX functionality to Windows.
Prometheus - An open-source systems monitoring and alerting toolkit.