Freeware - Dawesome ZYKLOP Resynthesis VSTi Plugin

 https://www.dawesomemusic.com/plugins/zyklop/

Meet Zyklop, MYTH’s fun, free-spirited little sister. She’s got just one gorgeous Eye, but that’s all she needs to pull you in. Powered by the same Re-synthesis V2 engine that made MYTH irresistible, Zyklop is ready to take you on a sonic adventure full of fun, exploration, and creativity.

Freeware - Variety of Sound TesslaPro Mk IV VST Plugin

 https://varietyofsound.wordpress.com/2024/03/01/tesslapro-mkiv-released/

Very nice saturation plugin.

Freeware - PSP Audioware PSP Chamber Reverb VST Plugin

 https://www.pspaudioware.com/products/psp-chamber

PSP Chamber is a freeware reverb plug-in that adds depth and dimension to your audio. Like classic hardware reverbs, it’s designed to emulate the acoustics of physical spaces of various sizes and shapes. The Chamber algorithm is carefully crafted to produce rapidly developing, dense reverberations with a smooth and natural decay. It’s a simple-to-use, great-sounding effect that’s a great go-to option for many tracking and mixing applications.

Freeware - Bipolar Audio BP-909 VSTi Plugin

 https://unableton.com/b/fX4PJ

Roland 909 plugin

Freeware - Fracture Sounds Blueprint Collection Kontakt Instrument Libraries

 https://fracturesounds.com/product-category/free/

A large and growing assortment of high quality Kontakt instruments.

Works with Kontakt Player.

Freeware - Analog Obsession Poortec VST Plugin

 https://www.patreon.com/posts/poortec-119632465

Pultec style EQ Free

Google Experiment - Instrument Playground

https://artsandculture.google.com/experiment/8QFo2oQr2uT3pg

Cool web app for AI instrument samples.

Freeware - RdPiano SA-synthesis digital piano VSTi Plugin

https://github.com/giulioz/rdpiano?tab=readme-ov-file

RdPiano accurately emulates SA-synthesis digital pianos, such as the Roland MKS-20, RD1000 and the Rhodes MK-80 electric piano. It simulates the CPU-B board reused in different models, emulating the CPU and the custom chips. The emulation of the custom chips is derived from silicon analysis. It also approximates the BBD chorus and tremolo effect, albeit less accurately than the digital emulation.

Freeware - Algoriffix Pitch Perfekt VST Plugin

https://www.algoriffix.com/

Unleash your inner rock star with Pitch Perfekt and Transkr V2 — our unmatched audio-to-MIDI plug-ins. Seamlessly integrated into your favourite DAW they will transform your voice or instrument into a MIDI controller in no time.

Freeware - Newfangled Audio Obliterate Filter VST Plugin

https://www.newfangledaudio.com/obliterate

Obliterate started life as a filter, but there was a bug in the code. We could have fixed that bug, but we let it fester. Over time that bug grew and mutated. It gained new powers and its anger warped them to its evil will. Seven years after that initial bug Obliterate can't be described as a filter at all. Obliterate is more like a new form of resonant distortion. Use cautiously. Use sparingly. And always clean up afterward.