AcetoneISO, is a feature-rich and complete software application to manage CD/DVD images. Thanks to powerful open source tools such as fuseiso, AcetoneISO will let You mount typical proprietary images formats of the Windows world such as ISO BIN NRG MDF IMG and do plenty of other things.

- From AcetoneISO Homepage

The use of AcetoneISO is pretty easy and much similar to DAEMON Tools. Just give AcetoneISO a try, and save time of burning a CD/DVD

P/S: By the way, you can find some interesting information of how to mount a ISO file at UbuntuForums.