CDBurnerXP Portable: Disc burning app for your USB flash drive
Sure, the price is right, but there's another thing that sets CDBurnerXP apart from most commercial apps: it comes in a portable version. In other words, you can download, unzip, and run CDBurnerXP from your hard drive, a USB flash drive, or any other media. There's no need to install it.
The portable version of CDBurnerXP isn't updated as frequently as the normal version. But you can always find the lastest build on the portable download page. The latest version of CDBurnerXP is 4.2.2 and contains some bug fixes you won't find in the most recent portable version which is 4.1.2.