Zabbix - Track, record, alert and visualize performance and availability of IT resources
Hollow Knight - Descend into the Dark Venture down into a beautiful, ruined world of insects and heroes
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.
Super Meat Boy - Let's start with what's the same: Dr. Fetus is still a jerk, gameplay is super challenging but fair, there are tight controls and great levels and you will die. a lot.
Prometheus - An open-source systems monitoring and alerting toolkit.
Secret Maryo Chronicles - Secret Maryo Chronicles is an Open Source two-dimensional platform game and is using an Open Graphics Library for the best possible graphic design and stock performance.