Serverspace.io
Ableton
AudioKit Synth One
Sampulator
Logic Pro X
Splice Beat Maker
NanoStudio
Serato Studio
Auxy Music Studio
ZynAddSubFX
Surge XT
Vital
Dexed
Serum
Synth1
Zebralette
FluidSynth
Based on our record, ZynAddSubFX seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've also used ZynAddSubFX, which is also a very powerful synth, though its interface (at least to me) is a bit of a clusterfuck. You could also try browsing this index of microtonally capable synths on the xenharmonic wiki. Source: about 1 year ago
The code for this can be found here on shadertoy! The audio was made with an Ibanez bass, Guitarix, Hydrogen Drums, ZynaddSubFX and Ardour! Source: over 2 years ago
Here is an additive synth - https://zynaddsubfx.sourceforge.io/. Source: over 2 years ago
There are VSTs for Linux. Surge, Vital, and ZynAddSubFx are three prominent examples, as well as OxeFM, Dexed, and plenty I'm forgetting. Surge and Zyn also come LV2 and DSSI, which are native Linux formats. For those who don't know, the VST3 SDK supports Linux, and is released under GPLv3 by Steinberg. Source: almost 3 years ago
AudioKit Synth One - Free & Open-source iPhone/iPad Synth 🎹
Surge XT - Open-source subtractive-hybrid synthesizer formerly sold commercially as Vember Audio Surge.
Sampulator - Make (and record) beats on your keyboard
Vital - Vital is a spectral warping wavetable synthesizer with drag'n'drop modulation workflow and animated preview of the synth's inner workings where needed. Comes with many modulation sources (including audio-rate), MPE support and FX chain.
Logic Pro X - Music production.
Dexed - Dexed is a multi-platform, multi-format plugin synth that is closely modeled on the Yamaha DX7.