Eina!

MPC-HC is an extremely light-weight, open source media player for Windows.

foobar2000 is an advanced freeware audio player for the Windows platform.

Clementine is a cross-platform free and open source music player and library organizer. It is a port of Amarok 1.4 to the Qt 4 framework and the GStreamer multimedia framework, focusing on a fast and easy-to-use interface for searching and playing your music. It is available for Unix-like, Windows and Mac OS X.

Winamp is a media player for Windows and OS X developed by Justin Frankel and Dmitry Boldyrev by their company Nullsoft, which they later sold to AOL, who sold to Radionomy in January 2014. Since version 2 it has been sold as freemium and supports extensibility with plug-ins and skins, and features music visualization, playlist and a media library, supported by a large online community.

Manage your music as a library, as playlists or as folders on the file-system. Organize, browse and find music on your computer, on portable devices and on the web. Small or large collections are handled with ease.

MediaMonkey is a music player and a music library manager with support for 50,000+ files and many features for organizing, tagging, converting and burning your music. It also has advanced podcasting and syncing features. MediaMonkey syncs with iPhones, iPods, and most other MP3 Devices. MediaMonkey is an All-in-One music manager solution with many plugins available.

Audacious is an advanced audio player. It is free, lightweight, based on GTK+, runs on Linux and many other *nix platforms and is focused on audio quality and supporting a wide range of audio codecs.

Rhythmbox is an audio player for Linux that plays and organizes digital music. Inspired by Apple's iTunes, it is free software that is designed to work well under the GNOME Desktop using the GStreamer media framework.

Amarok is a powerful music player for Linux, Unix and Windows with an intuitive interface. It makes playing the music you love and discovering new music easier than ever before - and it looks good doing it!

Play your music and videos. Stay entertained and up to date with podcasts and video podcasts. Discover new music with Last.fm radio. Sync your G1 phone, iPod, and other devices.

Quod Libet is a Gapless GTK+-based audio player written in Python. Its designed around the idea that you know how to organize your music better than we do. It lets you make playlists based on regular expressions (dont worry, regular searches work too). It lets you display and edit any tags you want in the file. And it lets you do this for all the file formats it supports - Ogg Vorbis, FLAC, MP3, Musepack, and MOD.

It just sounds better! The beauty is in its simplicity, yet behind the minimal exterior lies a powerful music player with a ton of features & support for all audio formats you should ever need.