VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
iMazing - iMazing lets you transfer music, files, messages, apps and more from any iPhone, iPad, or iPod to a computer, Mac or PC. Manage and backup your iOS device simply without iTunes. (was DiskAid)
foobar2000 - An advanced freeware audio player for the Windows platform.
iExplorer - iExplorer lets you easily transfer music, playlists, text messages, files and more from any iPhone, iPod, or iPad to a Mac or Windows computer and iTunes.
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.
CopyTrans - CopyTrans is a tool for managing the files on your iPhone or iPad through your computer's interface.