Visual Beat - Interactive music video
Zabbix - Track, record, alert and visualize performance and availability of IT resources
stats.fm - With the click of a button you'll be logged with your Spotify account and you'll instantly gain access to a valhalla of cool stats and insights.
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.
SoundViz - Turn music and sounds into beautiful art
Prometheus - An open-source systems monitoring and alerting toolkit.