Cross-platform player and audio manager
aTunes is a powerful, full-featured, cross-platform player and manager, with support for online radios, podcasts and CD ripping.
DGuitar is a Guitar Pro (*.GP4,*.GP3,GTP) viewer and player that works under Linux, MacOs, Solaris, BSD, Windows, or any other operating system with Java Runtime 1.4.X. http://DGuitar.sourceforge.net If you are a JAVA developer visit this page https://bitbucket.org/mauriciograciag/dguitar/overview
Music player with library for Linux (including Android) and Windows
Music player with touch optimized interface written using Qt/QML. It is especially useful for well tagged big music collection. It is easy to find and play the music you want.
CDnavigator is an application that files your CD in a database. It also deposits information about photos (JPG), music (MP3) and films saved in media. You can also store another metadata as notes, rating, etc. to this data. You can search over all items.
100% Java: ID3 tag, Exif, JPEG, TIFF, MP3, MP4, OGG, FLAC, WAVPACK, APE, ALAC, DSD, Image lossless editor/viewer/player/organizer. All Internet protocols publishing. A separate Jpeg manipulation library. Full iPod support - smart playlist, artwork, video.