Akinator - Akinator is an entertainment app that acts like a digital genie that can read your mind. The game will ask you a few questions about the character you have chosen, and it will attempt to guess the character from your provided answers.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Trivia Crack - Produced by Etermax, Trivia Crack lets players answer trivia questions and compete against other people on mobile devices.
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.
A Google a Day - Online trivia game where you use Google's search to answer questions as fast as you can.
Prometheus - An open-source systems monitoring and alerting toolkit.