Boss Video Player - An Interactive video player for websites that allows content producers to monetize...
Kinovea - Kinovea is a video player for sport analysis
Pretty Good Music Player - Music player that focuses on basics: rock solid music playing.
Video Coach - Video Coach is a tool that helps users analyze and improve their sports activities by recording videos of training and practice.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
PhysMo - PhysMo is an open-source (free!