Static.app - Static.app is the easiest way to host a static HTML website online.
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.
Graphite - Graphite is a highly scalable real-time graphing system.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
Grapedrop - Build free, responsive, website pages with an easy to use online builder. Design and publish online immediately or export the code and host it wherever you want
Zabbix - Track, record, alert and visualize performance and availability of IT resources