OpenNebula is the most advanced open-source toolkit for building private, public and hybrid clouds, offering unique features for cloud management and providing the integration capabilities that many enterprise IT shops need for internal cloud. OpenNebula is the result of many years of research and development in efficient and scalable management of virtual machines on large-scale distributed infrastructures. The technology has been designed to address the requirements of business use cases from leading companies in the context of flagship international projects in cloud computing.