Mixxx is Free DJ software that gives you everything you need
A high quality MP3 encoder
Audio codecs extracted from Android Open Source Project
A multi-format module player and library
MIDI libraries for Qt/C++
Freeverb3 DSP VST effect plugins
Polyphonic synthesizer LV2 plugin
Plays iMelody (IMY) files using many sound systems
Editor software for the PRIMOVA GX-2 Gear Shifter device
Very simple MIDI Player of JSON files
MP4 tagging library
Minimalistic Music Player
Modern music player and library organizer