VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Prisync - Prisync is a competitor price tracking and monitoring software for all sizes of e-commerce companies worldwide.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.
foobar2000 - An advanced freeware audio player for the Windows platform.
Skuuudle - Discover, match and monitor your eCommerce competitors.