Anyone heard of an open source tool to read ISO images?

[Hewitt Tech]

I just ran across a tool called undisker at www.undisker.com that is
supposed to be able to read from a .iso image file. Normally you would use a
CD burner to burn the image to a CD but this tool allows you to read the
contents of the .iso file. You can extract one or more files from the .iso
file without having to burn it to a CD. Does anyone know of an open source
version of this tool?

-Alex