Oxe FM Synth

Oxe FM Synth is an open source VST 2.4 instrument plugin for Windows, Linux and Mac OS X.

Dexed

Dexed is a multi-platform, multi-format plugin synth that is closely modeled on the Yamaha DX7.

The Kubernetes Package Manager

Open-source subtractive-hybrid synthesizer formerly sold commercially as Vember Audio Surge.

Synth1 is a software synthesizer. Functionally it is modeled on the Clavia Nord Lead 2 Red Synth.

Tunefish 4 is an additive/wavetable software synth.

ZynAddSubFX is an open source software synthesizer for Linux, Mac OS X and Microsoft Windows.

An old-school polyphonic additive synthesizer

A polyphonic synthesizer