Songbird is an open-source customizable music player that's under active development, its one of my favorite music players, check it out

The songbird team is working on creating a non-proprietary, cross platform, extensible tool that will help enable new ways to playback, manage, and discover music.

Features:

• Media Importing

  Add media to Songbird by importing from your file system or iTunes.

• Media Playback

  Songbird supports MP3, FLAC, and Vorbis on all platforms; WMA and WMA DRM on Windows; and AAC and Fairplay on Windows and Mac.

• GStreamer

  Songbird now uses GStreamer as our main media playback system, across all platforms.

• Smart Playlists

  Create dynamic playlists that automatically update based on criteria you set.

• Web Browser

  Songbird includes an integrated web browser with features like bookmarking, tabbed browsing, and more.

• Cross Platform

  Songbird runs on Windows, Linux and Mac.

• Multi-language Support

  Over 25 completed, community-contributed localizations and growing!

• Automatic Updates

  Always stay up to date using Songbird's built-in automatic updates.

• Setup Assistant

  Quickly setup Songbird for the first time.

• Custom UI

  Make Songbird your own by choosing from dozens of different skins feathers.

• Library Management

  Browse, organize, sort and search your media.

• Developer Support

  Songbird is getting better everyday thanks to its open platform and growing developer community.

Currently In Beta:

• Device Support

  Songbird's device support is limited. The Device Support wiki has additional details about what's supported. Apple iPhones, iPod Touch and Microsoft Zune devices are not yet supported.

• Metadata Management

  Songbird supports reading from and writing metadata to many music file formats. We still need to support the ability to fetch additional metadata from popular lookup services.

• Album Artwork

  Display the currently playing track's album art and write new artwork back to the file. We still need to support album art fetching.

• Subscriptions

  Subscribe to music blogs and download music directly to your library. We're working on ways to improve this feature.

• Performance & Stability

  Improving the performance and stability of Songbird is an ongoing focus. Each release we set aside dedicated cycles to ensure we're making progress.

Download Songbird 1.0
Songbird Site
Roadmap