VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Noizio - Feeling that the noise of the big city is too much for you to bear?
foobar2000 - An advanced freeware audio player for the Windows platform.
zenmix.io - Ambient background sound generator