.VMDK file extension

This is the basic program to work with .VMDK extension

VMware Workstation

VMware Workstation VMware virtual disk file

VMware Workstation allows you to run multiple operating systems as virtual machines (VMs) on your Windows PC. It is useful for IT professionals and developers who build and test software for multiple platforms. You can run Windows, Linux, and other operating systems simultaneously... (more)

The program works with the following extensions: vmt, vmx, ova, ovf, vmc, xvm, vmhr, vmtm, vmxa, vmpl, vmsd, vmxf, sv2i, vmdk, vmac, vmsn, vmba, conf, nvram and vmlog

.VMDK extension is also supported by the following program:

VMware GSX Server

VMware GSX Server VMware virtual disk file