Klystrack is a free tracker for making C64/NES/Amiga-style chiptunes on a modern platform. Here are some features:
orDrumbox is a free drum machine software, designed to be as creative as possible with unusual features : auto-composition, polyrythmes, unusual arpeggiator, automatic sounds/track matching, custom softsynths, lowfi rendering, etc.
LS Levelator is an energy/loudness normalization tool for batch processing of large amount of files.
LMMS is a free cross-platform software which allows you to produce music with your computer. This covers creating melodies and beats, synthesizing and mixing sounds and arranging samples. You can have fun with your MIDI keyboard and much more – all in a user-friendly and modern interface. Furthermore LMMS comes with many ready-to-use instrument and effect plugins, presets and samples.
Mixxx has everything you need to start making DJ mixes in a tight, integrated package. Whether you’re DJing your next house party, spinning at a club, or broadcasting as a radio DJ, Mixxx has what you need to do it right.
Giada is a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians. How does it work? Just pick up your channel, fill it with samples or MIDI events and start the show by using this tiny piece of software as a loop machine, drum machine, sequencer, live sampler or yet as a plugin/effect host.