cdwrite is a console shell for reading, writing, and copying audio CDs as well as for creating and writing ISO images on CD media and data or ISO images on DVD media. It can also encode WAV files or audio CDs to FLAC, MP3, or Ogg files, optionally using CDDB data and setting audio tags. Users that prefer command line interfaces can use cdwr.*, cdencode, and settags scripts instead of cdwrite.
mp3cd-tools packs directories of MP3 files in a space-efficient way, so that they can be burnt to CD-Rs for playing on an MP3 CD player. It takes a list of directories containing MP3 files, arranged in order of favoritism, and puts as much music as possible onto each disc. It is not necessary to burn all of the planned CDs at the same time.
audio_burn is a commandline audio cd burning application written in C. It uses libaudioburn (also written in C) for all of the real work, which in turn uses several other Free Software packages. It accepts WAV, Ogg, and MP3 input files, decodes them, and (optionally) normalizes them before writing them to CD.
make_cd_label is a script that helps create stickers for CDs. It is intended to be integrated with your backup scripts, but can also make stickers for audio CDs using CDDB and disc-cover. The output is an XML file that can be read into glabels and then edited or printed. It uses Memorex or Avery CD label stickers.