Don't need. Use any software to create a ISO image and mount it using a loop device
mount /path/to/image.iso -o loop /mnt
will mount the ISO (image.iso) on /mnt
Some distros like Linux Mint will aloe you to right click and mount ISO images. Don't have to install anything else.
Note: You can create ISO images with any CD/DVD burning software and many other (GUI/command line) tools.
Note2: Check the "Similar Threads" section at the bottom for more info.