Win

DAEMON Tools Pro is an advanced application for CD/DVD multimedia emulation and making CD/DVD images.
DAEMON Tools Pro allows users to make CD/DVD disc images, create a virtual CD / DVD drives and play CDs & DVDs without the need for the physical disc and supports virtual SCSI and IDE adapters.
Also included is a Virtual DVD-ROM drive (Generic DVD-ROM) enabling you to use your CD/DVD  images as if they were already burned to CD.

VMware Workstation 6 makes it simple to create and run multiple virtual machines on your desktop or laptop computer. You can convert an existing physical PC into a VMware virtual machine, or create a new virtual machine from scratch. Each virtual machine represents a complete PC, including the processor, memory, network connections and peripheral ports.