What are some alternatives?
When comparing WinISO and WinCDEmu, you can also consider the following products
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.
UltraISO - CD image files are easily created with UltraISO.
ImgBurn - What in the Heck is IMG Burn? We all need to copy discs from time to time.
Virtual CloneDrive - Virtual CloneDrive works and behaves just like a physical CD/DVD/Blu-ray drive, although it only exists virtually.
MagicISO - MagicISO is a powerful CD/DVD image file creating/editing/extracting tool.
xorriso - xorriso is a command-line (+Frontend) ISO 9660 editor, formatter and burner for CD, DVD, an BD.