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.
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.
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.
Google Compute Engine - Google Compute Engine is not just fast. It’s Google fast.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Microsoft Azure - Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.