The VMware Hypervisor can be downloaded for free.
Optional S&S - Subscription and Support for 1 year, Production: 24 Hours/Day 7 Days/Week 365 Days/Year; Basic:12 Hours/Day Monday-Friday. Other Packages (Acceleration Kits Essential Kits are available), details here: http://www.vmware.com/files/pdf/vsphere_pricing.pdf