AudioBombs (Synth Presets, Synth Patches) https://audiobombs.com
Rekkerd.org (Patches by plug-in) https://rekkerd.org/patches/plug-in/
u-he (The u-he Patch Library) https://u-he.com/PatchLib/

Spoiler: Free Soundbanks and Presets - Link List

Free Soundbanks and Presets - Link List

99Sounds - We Craft Sounds
https://99sounds.org

Aiyn Zahev Sounds
https://www.aiynzahev-sounds.com/pages/free-sounds

AKWF FREE (waveform samples)
https://www.adventurekid.se/akrt/waveforms/adventure-kid-waveforms/

AudioBombs - Synth Presets, Synth Patches
https://audiobombs.com

AZur Studio - VST related stuff
http://bji.yukihotaru.com/vst.html

CFA-Sound - Free Sounds and Presets for Synthesizers
https://www.cfa-sound.com/free-sounds/

Daniel Stawczyk a.k.a STATUS
https://www.stawczyk.com/freebies.html

Free VST's
https://freevsts.com/presets/

Producer Feed
https://www.producerfeed.com/category/free-synth-presets

Rekkerd.org
Free patches & sound banks
https://rekkerd.org/patches/
Patches by sound designer
https://rekkerd.org/patches/sound-designer/
Patches by plug-in
https://rekkerd.org/patches/plug-in/

Resonance Sound
401 Presets for Srum, Synlenth1, Massive, Spire, Diva
www.resonance-sound.com/free-samples-sounds/

Rob Papen - Blue II - User Presets
www.robpapen.com/blue-2-user-presets.html

DocT
www.trippler.net/music/Download/PPG_Wave_2_V/ppg_wave_2_v.html
www.trippler.net/music/Download/Synth1/synth1.html

Summa aka Klaus-Dieter Pollack
www.summasounds.de/html/download.html

SynthLine
reFX - Vanguard VSTi
www.synthdesign.de/refx.htm#Nebular

The Unfinished Synth Sounds
www.theunfinished.co.uk/free/

u-he (The u-he Patch Library)
https://u-he.com/PatchLib/

ViciousAntelope
www.viciousantelope.com/presets-for-synths?Pack+Type=Free+Preset+Packs&page=2

Xenos Soundworks
http://xenossoundworks.com/free_presets.html

Ultimate Patches
www.ultimatepatches.com/free-synth-presets-patches.html

Xenos Soundworks
http://xenossoundworks.com/free_presets.html

ZenSound
https://www.zensound.es/free/

 

Last edited: Nov 27, 2022

@BEAT16 : there is now also another patchLib page launched by Urs a few months ago, that you can add to your list:

https://u-he.com/community/patchlib/

The old one remains available, but the new presets will now be added only in the new page.

 

Thank you @BlackWinny for the wonderful tip.