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 utility to convert a Flac library to MP3, Opus or Ogg Vorbis format.
A multi-format module player and library
MIDI libraries for Qt/C++
Audio visualisation library
Automatic audio RMS normalizer & splitter
ASIO output module for winamp media player & SRD file resampler
Qt-based Multimedia Player
Freeverb3 DSP VST effect plugins
A library to play Commodore 64 music derived from libsidplay2
Linux Studio Plugins Project