abcde is a frontend to cdparanoia, wget, cd-discid, id3, and your favorite Ogg Vorbis (the default), MP3, FLAC, Ogg Speex, or MPP (Musepack) encoder. It grabs an entire CD and converts each track to the desired format, then comments or ID3-tags each file, all with one command. It supports multiple output in a single CD read, the creation of a single track from a CD, resume operation, CD concatenation, volume normalization, gapless encoding (with LAME), parallelization, SMP, proxies, customizable filename organization and munging, playlist generation, distributed encoding via distmp3, and more.
Podget is a simple podcast aggregator optimized for running as a scheduled background job (i.e. cron). It features support for downloading podcasts from RSS and XML feeds, for sorting the podcasts into folders and categories, for importing podcast URLs from iTunes PCAST files and OPML lists, automatic M3U and ASX playlist creation, and automatic cleanup of old podcasts. It also features automatic UTF-16 conversion for podcasts hosted on Windows servers.
burnCDDA is a console frontend to cdrdao, cdrecord, MPlayer, mpg321, oggdec, mppdec, flac, normalize, and mp3_check. It can be used to create audio CDs from an M3U playlist (the playlist format of XMMS and amaroK) or from files inside a directory. It supports MP3, OGG Vorbis, Musepack, FLAC, WMA, M4A, and WAV files, and it might be the easiest way to copy an audio CD.
audio convert is a script that converts between WAV, Ogg, MP3, MPC, FLAC, APE, AAC, and WMA files. It has an easy-to-use interface that makes it possible to fill in the tags for a few formats, copy the tags from input files into the new files, and choose the quality of compression. The script was initially designed for the Nautilus file browser and can be easily installed into Nautilus by using the installer provided with the script. You can then right-click on files and choose "audio-convert" from the "scripts" menu. The script is also known to work on rox or directly from a shell.
mkat is a set of command line tools for burning and cataloging data CD/DVD/BD and audio CDs. The catalog can later be searched for certain files or an audio CD. Tags can be used to categorize CD/DVD/BDs, e.g. comedy, drama, kids, sports. mkat is configured to use wodim/growisofs and genisoimage to do the real work, but it should be possible to configure it to use arbitrary programs.
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.
audiokonverter is a small utility to easily convert from OGG, MP3, AAC, M4A, FLAC, WMA, RealAudio, Musepack, Wavpack, WAV, and movies to MP3, OGG, M4A, WAV, and FLAC in Konqueror by right-clicking on them. It needs oggenc, oggdec, faac, faad, flac, mplayer, wvunpack, and lame to work. id3lib, metaflac, and vorbis-tools are optional, but needed for full functionality.
MP3DB2 is a collection of bash scripts for keeping track of large MP3 collections. It will retrieve song information from the filenames and ID3 tags of a directory or CD of MP3s and store them in a local database. It then allows you to search any of the fields, generate a master listing of all your complete albums, see the size of your entire collection, and more.