VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Breue - Breue - Build and launch your product in 4 weeks
foobar2000 - An advanced freeware audio player for the Windows platform.
Upwork - Forget the old rules. You can have the best people. Right now. Right here.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
IssueHunt - IssueHunt is a crowd funding service for opensource contributors and owners!