Many of us have already heard of the term “software stack.” It shows the software layers in boxes stacking up on each other, all the way from operating system, to middleware, and to applications. When these layers are offered as services, we have IaaS (Infrastructure As A Service), PaaS (Platform As A Service), and SaaS (Software As A Service) respectively for so called cloud service stack. These two stacks are essentially similar if not the same.
My company has created products like vSearch ("Super vCenter"), vijavaNG APIs, EAM APIs, ICE tool. We also help clients with virtualization and cloud computing on customized development, training. Should you, or someone you know, need these products and services, please feel free to contact me: steve __AT__ doublecloud.org.
Me: Steve Jin, VMware vExpert who authored the VMware VI and vSphere SDK by Prentice Hall, and created the de factor open source vSphere Java API while working at VMware engineering. Companies like Cisco, EMC, NetApp, HP, Dell, VMware, are among the users of the API and other tools I developed for their products, internal IT orchestration, and test automation.