10gen, which is both a cloud platform and a downloadable open source package, can be used to create your own private cloud. 10gen is a software stack similar to app Engine that provides functionality similar to the app Engine-but there are some differences. With 10gen, you can use Python and JavaScript. and the Ruby programming language to develop an application. The platform also uses sandbox concepts to isolate applications, and many computers that use their own application servers (of course, built on Linux) provide a reliable environment.
The Eucalyptus project (Elastic Utility Computing architecture for linking Your Programs useful) is an open source implementation of the Amazon Bae, It is compatible with the commercial service interface. Like EC2, Eucalyptus relies on Linux and Xen for operating system virtualization. Eucalyptus was developed by the University of California (Santa Barbara) for cloud computing research. You can download it from the university's Web site or experience it through Eucalyptus public Cloud, although there are some limitations.
Enomalism Cloud computing platform. Enomalism is an open source project that provides a cloud computing framework that functions like EC2. Enomalism is based on Linux and supports both Xen and Kernel Virtual Machine (KVM). Enomalism provides a software stack based on the TurboGears WEB application framework and Python.