VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Tricount - Manage and share expenses with friends
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Kittysplit - The easiest way of sharing costs with a group of friends
foobar2000 - An advanced freeware audio player for the Windows platform.
ihatemoney - Manage your shared expenses, easily