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.
Spotify - Map shows when two people play same song at same time
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
SoundCloud - Enjoy music & follow favourite artists
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm