CoffeeRun - Let everyone enter their order for coffee runs
Zabbix - Track, record, alert and visualize performance and availability of IT resources
QuizBreaker - A fun online quiz game for teams to get to know each other
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.
Lunch Roulette - Collaboration by grouping coworkers randomly for lunch.
Prometheus - An open-source systems monitoring and alerting toolkit.