It lets you quickly and easily convert NRG images to ISO files.
ISOpen is a multi-purpose tool that creates, burns and converts images.
Power Software Ltd.
Create an mount images of CDs and DVDs on virtual drives.
AnyToISO can extract various CD/DVD image file formats.
A free file extraction tool with support for all the best-known archive formats.
Gemc allows you to get a much better compression rate out of CD image files.