VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Kinovea - Kinovea is a video player for sport analysis
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Video Coach - Video Coach is a tool that helps users analyze and improve their sports activities by recording videos of training and practice.
foobar2000 - An advanced freeware audio player for the Windows platform.
Scoutium - Until there is no undiscovered talent!