PowerISO - PowerISO is a virtual drive that allows users to encode, burn, mount, and even encrypt CDs, DVDs, and BDs. The software can be downloaded from many platforms and sites online.
Beyond Compare - Beyond Compare allows you to compare files and folders.
UltraISO - CD image files are easily created with UltraISO.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
WinCDEmu - WinCDEmu is an open-source CD/DVD/BD emulator.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.