LMMS - Make music with a free, cross-platform tool
KORG Gadget - KORG Gadget - From iOS to Mac. Music production software to help your musical imagination become reality.
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.
Moog Model 15 - Meticulously recreated rendition of the classic Moog Model 15 modular synthesizer.
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Poison-202 - Vintage MIDI synthesizer for Mac and iOS