VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Google Test - Google Test is a unit testing for C++ programming language that is based on xUnit architecture.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
UnitTest++ - Download JF Unittest for free. A C++ unittest framework, written out of frustration with the existing unittest frameworks out there. No GUI with colorful progress bars, no dependencies on any other package in the world.
foobar2000 - An advanced freeware audio player for the Windows platform.
Cantata - "Module testing early during development is becoming more important due to the increasing complexity of software.