Geckoboard - Get to know Geckoboard: Instant access to your most important metrics displayed on a real-time dashboard.
Cachet - Cachet is a free, open source status page for your API, service or company. Built with all of the features that you'd expect from a status page.
freeboard - An open source real-time dashboard builder for IOT and other web mashups.
cState - 🔥 Free & open source under MIT!
Cyclotron - Cyclotron is a platform for creating and hosting dashboards, independent of any single data source.
Status.io - Status.io is a platform for system status pages and status notifications. Companies rely on Status.io to track outages, schedule planned maintenances, broadcast status notifications, and much more; and their customers love the transparency.