Companies developed a lot of applications and still developing, most of them for niches but anyway salesmen need at some point to showcast the software and let the customer ‘play’ with it as well.
VMware Studio helps author appliances that can then be validated through VMware Ready Program. These Appliances run seamlessly on VMware products such as VMware Infrastructure, VMware ESXi, VMware Workstation, VMware Fusion and VMware Server, as well as on third-party virtualization products that support the OVF specification. In addition, virtual appliances built with VMware Studio carry an in-guest management framework that provides management capabilities for end users to perform administrative tasks such as configuring, updating and managing virtual appliances.
VMware has posted some very interesting videos that you can view here!