iBwave Wi-Fi - iBwave Wi-Fi software suite brings smart networking solutions to enterprise, education, hospitality, transportation, retail, office, healthcare, public venues, and residential wireless networks.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Homedale - With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.
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.
TamoGraph Site Survey - Wi-Fi site coverage survey and modelling application
Prometheus - An open-source systems monitoring and alerting toolkit.