Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.
foobar2000 - An advanced freeware audio player for the Windows platform.
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.
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.