CloudStack

CloudStack is a open source cloud computing software for creating,managing and developing intrastructure cloud amd service.It uses existing hypervisors such as KVM,VSphere, and XenServer/XSP for virtualization.

 In addition to its own API , CloudStack also supports ,ie, Amazon Web Services(AWS).API CloudStack enables users to build, manage and deploy compute environments in public /private datacenters regardless of hypervisor;KVM , XenServer,Xen Cloud Platform, VMware , and Oracle VM. 

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Features

•    Dynamic Workload Management
•    Virtual router & Network
•    Hypervisor Independence
•    Delegated Administration
•    Built-in High-availability for host and VMs
•    AJAX web GUI for management
•    AWS API compatibility
•    Hypervisior agnostic
•    Snapshot management
•    Usage metering
•    Network management (VLAN's, security groups)
•    Virtual routers, firewalls, load balancers
•    Multi-role support 

You can also download the source code via the Apache CloudStack git repository.

#You have to risk it ,to get the biscuit...