virtualization

CloudStack is an open-source cloud computing software platform for creating, managing, and deploying infrastructure cloud services. Built with Java and Python, it provides a complete Infrastructure-as-a-Service (IaaS) solution with comprehensive virtualization and cloud management capabilities.

OpenNebula is a cloud computing platform for managing heterogeneous distributed data center infrastructures. Built with C++ and Ruby, it provides a comprehensive solution for building and managing enterprise clouds with support for multiple hypervisors and cloud architectures.