What are some alternatives?
When comparing Brasero and UltraISO, you can also consider the following products
ImgBurn - What in the Heck is IMG Burn? We all need to copy discs from time to time.
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.
CDBurnerXP - Free CD, DVD, ISO, HD-DVD and Blu-Ray burning software with multi-language interface. Everyone, even companies, can use it for free.
InfraRecorder - Welcome to the home of InfraRecorder on the internet! InfraRecorder is a free CD /DVD burning solution for Microsoft Windows.
AnyBurn - AnyBurn is a light weight but professional free CD / DVD / Blu-ray burning software
WinCDEmu - WinCDEmu is an open-source CD/DVD/BD emulator.