Name: ISO Buddy
Website: http://www.dvd-ranger.com/prod_isobuddy.asp
License: Freeware
Description: ISOBuddy is an ISO image file processing tool that can convert almost any (disc) image file format to ISO. Can convert GI, NRG, CDI, MDF, IMG, B5I, B6I, DMG, PDI, BIN and CCD to ISO, Burn ISO and erase discs.
Notes: I realise this application doesn't perform an everyday function however it's the sort of app that when you need it you need it.