Helm is a free, cross-platform, polyphonic synthesizer with a powerful modulation system. Helm runs on GNU/Linux, Mac, and Windows as a standalone program or LV2/VST/VST3/AU plugin.

Tunefish 4 is described as 'A virtual analog synthesizer, Tunefish v4 was developed as a smaller replacement of Tunefish v3 with roughly the same power - some might argue it's even more powerful. It was also ported over to Linux and MacOS and was given a new polished UI' and is an app in the audio & music category. There are more than 10 alternatives to Tunefish 4 for a variety of platforms, including Windows, Mac, Linux, BSD and iPad apps. The best Tunefish 4 alternative is Helm, which is both free and Open Source. Other great apps like Tunefish 4 are ZynAddSubFX, Odin 2, Dexed and Surge Synthesizer.
Helm is a free, cross-platform, polyphonic synthesizer with a powerful modulation system. Helm runs on GNU/Linux, Mac, and Windows as a standalone program or LV2/VST/VST3/AU plugin.

ZynAddSubFX is a fully featured open source software synthesizer capable of making a countless number of instruments, from some common heard from expensive hardware to interesting sounds that you'll boost to an amazing universe of sounds.




Odin 2 is a versatile 24-voice polyphonic synthesizer that covers about every type of synthesis out there. Odin 2 is released as open-source software.




Dexed is an FM-type softsynth developed by Pascal Gauthier of Digital Suburban. It is an ideal application for importing, playing and editing/managing sysex patches from both the classic Yamaha DX7 synthesizer and the TX7.

Surge is an open source digital synthesizer originally written and sold as a commercial product by @kurasu (Claes Johanson) at Vember Audio. The synth uses subtractive hybrid synthesis and each patch contains two 'scenes' which are separate instances of the entire...




TAL-NoiseMaker is an improved version of TAL-Elek7ro and has a completely new synth engine and a lot of improvements in sound and usability. The synth also includes a small effect section with a reverb, chorus and a simple bit crusher effect.

Synth1 is a software synthesizer modeled on the Clavia Nord Lead 2 Red Synth. It combines the common sound synthesis method of Subtractive & FM synthesis.



Oxe FM Synth is a touch-sensitive, realtime polyphonic FM-based music synthesizer created and maintained by Oxe Software.



synthv1 is an old-school all-digital 4-oscillator subtractive polyphonic synthesizer with stereo fx.



SynthMaster One is an easy to use wavetable synthesizer with an intuitive workflow. With its simple layout, rich wavetable/waveform content and inspiring factory presets library, designing new sounds with SynthMaster One is a real joy.



