Tunez is an MP3/Ogg jukebox that works with a voting system. You can vote for your favorite tracks via the Web interface, and the Tunez daemon will take care of the rest. It is ideal for shared work environments and LAN parties. Tunez also works equally well as an interface to an Icecast server (v2.0 is supported via Ices v0.3). Tunez makes it easy to update ID3 tags for all your MP3s. Support for grabbing Amazon art in included for all of your favorite albums. A full user/group permission scheme is available so that you can customize Tunez for your own use.
madman is a music manager application in the vein of Apple's iTunes and its many clones. It serves as a tag editor, a media library, and a CD burning frontend, and is extensible through plugin scripts. Dynamic playlists and powerful search features allow you to listen to better music all the time.
puddletag is a tag editor for Linux loosely based on mp3tag. It uses a table layout so that all the tags you want to edit by hand are visible and easily editable. puddletag excels at automating repetitive tasks like extracting tag information from filenames, tagging files from a text file or the clipboard, renaming or moving files and folders based on tags by using patterns, and manipulating tags using actions and regular expressions. Supported formats include id3v1, id3v2 (.mp3), AAC (.m4a), VorbisComments (.ogg, .flac), and APEv2 (.ape). Much of mp3tag's functionality has been replicated with added enhancements and tweaks.
DR14 T.meter is a commandline tool for computing the Dynamic Range of your music according to the procedure used in the offline meter released by the Pleasurize Music Foundation. It is very useful to measure how loud your music is and to understand that a good quality album always has a good dynamic. It's also useful for understanding the effects of the so-called loudness war.
wxMusik is a fast and lean music library player for Windows and Linux. It supports MP3, MP2 , Ogg, APE, MPC, and FLAC, WAV, and AIFF formats on all platforms and WMA on Windows. It features powerful dynamic playlists that use SQLite, supports listening to Icecast and Shoutcast streams in a reliable manner, and has a nice cross-fading feature and a really cool autodj feature.
The DashPC car multimedia system is a UI for automobile multimedia implemented in Linux. Its provides a comprehensive interface for MP3, DVD, and CD playback, a radio card interface, and GPS navigation. It features an easy-to-use interface and a modular design. Its functionality is configurable and the system is expandable with the use of plug-ins, which currently include plug-ins for controlling video4linux supported radio cards, viewing images, and running external commands.