What are some alternatives?
When comparing Apache CloudStack and OpenNebula, you can also consider the following products
OpenStack - OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API.
LINK Datacenter - LINK Datacenter owns and operates one of the largest data centers in Egypt.
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.
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
Virtualizor - Virtualizor is a powerful web based VPS Control Panel.
Scalr - Scalr is cloud management software for public & private infrastructure