RightScale

RightScale enables organizations to easily deploy and manage business-critical applications across public, private and hybrid clouds.

Apache CloudStack

CloudStack is an open source cloud computing software for creating, managing, and deploying infrastructure cloud services.

CopperEgg

Monitor all of your servers, all of your web apps, and all of your databases all of the time from the cloud.

OpenStack

OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API.

Pingdom

With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.

Proxmox Virtual Environment

Proxmox VE is an open-source server virtualization platform to manage KVM virtual machines, LXC, software-defined storage and networking, HA clustering, and multiple other out-of-the-box tools on a single solution.

Site24x7

Site24x7 offers both free & paid website monitoring services. Monitor websites remotely and receive instant email/sms alerts if your website becomes unavailable. View uptime & performance graphs of your website monitors.