VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
ADSR Sample Manager - A smart sample management tool for your DAW
foobar2000 - An advanced freeware audio player for the Windows platform.
Soundly - Functional music for better sleep, focus and relaxation
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.
Resonic Player - Resonic is the planet's fastest audio and music player, browser, and sample manager, built around a big waveform view and a frequency analyzer.