Studio Amplify - Create cutting edge music and audio apps
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Melody ML - Easily separate audio tracks using machine learning
foobar2000 - An advanced freeware audio player for the Windows platform.
Theremin - Multitouch synth instrument that makes an array of sounds
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.