LEET is Johan Von Konow’s modular affordable synth you can build yourself. It consists of several MIDI devices that can be used together or separate with your preferred DAW. This page includes the 3d print file, the code, and an innovative circuit board system.
Other cool projects on Johan’s website include a 3d-printable Eurorack modular synth, and a 3d printable Gameboy-style console.