Wikipedia
UltraISO
UltraISO is an application for Microsoft Windows for creating, modifying and converting ISO image files used for optical disc authoring.
Initially UltraISO was shareware however since 2006 it has turned 'Premium' and become chargeable. The 'Free Trial' version is limited to ISO images of 300Mb or less
UltraISO is currently produced by EZB Systems.