What are some alternatives?
When comparing Apache CloudStack and Scalr, you can also consider the following products
OpenNebula - The Simplest Cloud Management Experience
OpenStack - OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API.
Morpheus - Morpheus is integration software designed to help major cloud infrastructure work in harmony. For example, if a company has assets on both Google's and Amazon's cloud services, Morpheus helps bridge the gap to improve productivity.
LINK Datacenter - LINK Datacenter owns and operates one of the largest data centers in Egypt.
RightScale - RightScale enables organizations to easily deploy and manage business-critical applications across public, private and hybrid clouds.
ManageEngine Desktop Central - Desktop Central is a Desktop Management and Mobile Device Management Software for managing desktops in LAN and across WAN and mobile devices from a central location. It supports managing Windows, Mac and Mobile devices running iOS 4 and above