The Pro version of the program is $23, but they also have a lite version, which is free.

Any2ISOĪs the name suggests, Any2ISO can convert pretty much any file format to an ISO image. You can see all the feature differences between the standard version and the free version in the link. You can use WinISO to view the contents of BIN, NRG, and ISO files and to create bootable ISO images. Luckily, you can do most of this with the free version too, it’s just got an older looking interface, which isn’t a big deal to me. The Standard version is $20, which isn’t bad, but only useful if you need to edit, create, convert, mount or burn ISO images.

WinISO is another free program, but you have to download the older 5.3 version instead of the newer version.