Argus - Collections management for museums & galleries
Zabbix - Track, record, alert and visualize performance and availability of IT resources
RemoteRetro - A tool for having agile retrospective meetings remotely! RemoteRetro makes retros easier and more effective, even when your colleagues are in different locations.
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.
Meow Playground - Imagine Club Penguin with cats!
Prometheus - An open-source systems monitoring and alerting toolkit.