CDBurnerXP is a free application to burn CDs and DVDs, including Blu-Ray and HD-DVDs. It also includes the feature to burn and create ISOs, as well as a multilanguage interface.
ImgBurn is a free program that allows the recording of many types of CD/DVD images to recordable media. ImgBurn can also burn files and data directly to CD/DVD. It supports padding DVD-Video files so the layer break occurs on a proper cell boundary (where possible). It’s probably the most extensive out of all. If you’re looking for something advanced and with lots of features ImgBurn seems like a good candidate.