VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
BOSEbuild Speaker Cube - Build-it-yourself Bluetooth speaker for curious kids
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Sonos One - A self-contained, Alexa-connected speaker from Sonos
foobar2000 - An advanced freeware audio player for the Windows platform.
SOUNDBOKS - The loudest battery-powered speaker on the market.