Daemon Tools Ultra (typically stylized as DAEMON Tools Ultra) is a powerful piece of software that allows you to create a virtual disk drive or hard drive and use it for many of the same purposes as a physical drive could be. You can run installers or play games requiring CDs, create images of your own disks or data that you or others can later download, and much more.
Power And Simplicity
Daemon Tools Ultra supports a huge variety of formats. That's a standard part of the Daemon Tools suite. It also lets you both create and run disk images, as mentioned above. What this version does in particular is manifold: first, you can 'quick mount' CDs without going through making drives for them, and you can perform multiple tasks at once, both saving time. Finally, the software provides information from the web about disk images you mount.
A Medium-Weight Option
Basically, Daemon Tools Ultra works effectively to allow you to do a huge variety of disk imaging tasks. The only problem it has is that, for example, reading the contents of a virtual CD from your hard drive is slower than reading a physical cD. But this depends mostly on your computer's hardware, only a bit of the overhead is caused by DTU itself. Overall, if you want to make or use virtual disk images and get the most out of them, this software is a great option.