Zabbix - Track, record, alert and visualize performance and availability of IT resources
productboard - Beautiful and powerful product management.
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.
Aha - Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.
Prometheus - An open-source systems monitoring and alerting toolkit.
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.