VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Headphones - Automatic music downloader for SABnzbd. Headphones is an automated music downloader for NZB and Torrent, written in Python. It supports SABnzbd, NZBget, Transmission, µTorrent, Deluge and Blackhole.
foobar2000 - An advanced freeware audio player for the Windows platform.
Lidarr - Lidarr is a music collection manager for downloading and organizing music libraries.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
MP3base - MP3box - free mp3 search and download, stream music online for free, play tons of artists, albums and songs without registration.