MPC–HC is a freeware audio and video player based on Media Player Classic, that has a minimalistic interface and integrates many new useful features.

mpv is a free and open-source media player that combines features from the MPlayer and mplayer2 projects.

LAV Filters (formerly LAVFSplitter) is a collection of DirectShow media splitters and audio/video decoders that allow you to play a wide range of media formats.

FFmpeg is a collection of different projects (libraries and tools) able to process multimedia content such as audio, video and subtitles.

ProgDVB allows you to watch online TV and to listen to radio channels from all over the world.

In order to play MP4 files, you must have MP4 Splitter installed. It allows you to demultiplex your movies into individual streams.

PotPlayer (or KMPlayer Reloaded) is a comprehensive media player that can handle nearly any format without requiring the installation of codec packs.

Camtasia Studio is robust and user-friendly video editing software that enables you to create captivating and professional-quality video productions.

XMPlay may represent a good option for you, too – its developers call it “the world's most accurate module player”.

REAPER is a complete software tool for recording, arranging, editing and playing audios, and it also supports batch conversion.