Burn is an application to burn most common disks: data disks, audio disks (mp3, audio cd), video disks (VCD, SVCD, DVD-Video, DivX), images and disk copy.
Burn folder is a small application for burning CD-Rs or DVD-Rs.
Burnerz is an information utility that provides "live" information about disc-burner compatibility and the capabilities and status of attached disc burners.
CDCoverTool is a tool for downloading and printing CD covers.
(commercial) Disc Cover is an intuitive Mac OS X software to create labels and covers for CDs, DVDs and more. Variety of professionally made designs are just fine for a quick start. The program imports data and images from iTunes, iPhoto, Finder, iDVD and many other sources. You can easily experiment with styles and graphic tools. Disc Cover will fairly serve to bring you more and more design ideas.
(shareware) Disc-o is a small easy to use CD/DVD burning utility. Disc-o features support for ISO, HFS and Joliet as well as Disc Image support.
DVD Imager is a user friendly interface for creating Video DVD disk images that hides the complexities of Jörg Schilling's mkisofs tool.
LiquidCD is a freeware for burning CDs and DVDs. It can read most popular formats such as .iso, .dmg and even .toast, cue/bin and .cdi (DiscJuggler).
Max is an application for creating high-quality audio files in various formats, from compact discs or files. Max leverages open source components and the resources of Mac OS X to provide extremely high-quality output. For example, MP3 encoding is accomplished with LAME, Ogg Vorbis encoding with aoTuV, FLAC encoding with libFLAC, and AAC and Apple Lossless encoding with Core Audio. Many PCM conversions are also possible using Core Audio and libsndfile.
SimplyBurns is a Mac OS X (requires 10.4.x aka "Tiger") application with a GUI, which allows the user to burn CD / DVD media.