Amarok is the music player for Linux and Unix with an intuitive interface. Amarok makes playing the music you love easier than ever before - and looks good doing it. (GPL)

Aqualung is an advanced music player originally targeted at the GNU/Linux operating system, today also running on FreeBSD, OpenBSD and Microsoft Windows. (GPL)

Ario is a GTK2 client for MPD (Music player daemon). The interface used to browse the library is inspired by Rhythmbox but Ario aims to be much lighter and faster. (GPL)

aTunes is a full-featured audio player and manager, developed in Java programming language, so it can be executed on different platforms. (GPL)

Audacious is a GUI-based free software media player for POSIX systems, such as Linux. (GPL)

Banshee is a music management and playback application for Gnome. (MIT)

Decibel Audio Player is a GTK+ open-source audio player designed for GNU/Linux, which aims at being very straightforward to use by mean of a very clean and user friendly interface. (GPL)

Exaile is a music player aiming to be similar to KDE's Amarok, but for GTK+ and written in Python. (GPL)

Gimmix is a graphical music player daemon (MPD) client written in C using GTK+2. (GPL)

GMPC is one of the oldest, longest maintained and the most full featured GUI mpd client. It can be easily exteneded using the many available plugins. (GPL)

Listen is a Music player and management for GNOME written in Python. (GPL)

Muine is an audio player for the GNOME desktop environment. (GPL)

musikCube is a partially open source audio player. (BSD)

Rhythmbox is an integrated music management application, originally inspired by iTunes from Apple. (GPL)

Songbird is a desktop media player mashed-up with the Web. (GPL)

VLC media player is a highly portable multimedia player for various audio and video formats. (ZPL)