CloudZoom is a virtual appliance (cloud application) marketplace, providing users with a comprehensive catalog of all commercial and open source cloud apps for use in public, private, or hybrid cloud infrastructures. Cloud applications, also known as virtual appliances, are 'ready to run' software stacks (made of operating systems and applications) packaged as virtual images that can be deployed easily in cloud infrastructures. A few of the better known cloud application vendors are BitNami and JumpBox.