Freeware - Spitfire BBC Symphony Orchestra Discover VSTi Plugin

https://www.spitfireaudio.com/en-us/products/bbc-symphony-orchestra-discover

Write music with the world-famous BBC Symphony Orchestra — now including a concert grand piano. Discover 34 instruments, brought to life inside our free, easy-to-use plugin, compatible with any major music creation software – from Garageband to Pro Tools. A whole orchestra at your fingertips, Discover is designed to make orchestral scoring accessible to music creators of every level – from those just starting out, to professional composers.

Update/replacement to the previous BBC Orchestra.

Freeware - Circvit Bass VSTi Plugin

https://circvit.com/plugins/bass/

Virtual bass instrument of LEGATOR Wraith 37" Multi-Scale 5 string bass with FISHMAN Fluence Modern Active Humbuckers.

Freeware - SFLT Soundfont Player VSTi Plugin

https://estrobiologist.gumroad.com/l/sflt

SFLT is a new SoundFont player plugin, built with videogame musicians and power users in mind. It aims to deliver excellent SoundFont spec compliance, customizable and high-quality sound output, and a great user experience. It is available both as VST3/CLAP, and as a native FL Studio plugin.

Freeware - Floe Sample Library Platform VSTi Plugin

https://floe.audio/

Find, perform, and shape sounds beyond their natural boundaries. A free, open platform that puts sound transformation at your fingertips – built with care and simplicity in mind.

Freeware - Crow Hill Company Vaults VSTi Plugin

https://thecrowhillcompany.com/vaults/

Revolving selection of high quality free instruments. Once redeemed, own forever.

Freeware - Splash Sound Kalimba Kontakt and VSTi Plugin

https://evainstruments.com/products/kalimba/

This is the second instrument in our ever-growing Play Collection, a series of simple, expressive instruments available completely free. Kalimba is an African kalimba instrument, built on deep sampling and delivering a clean, authentic sound right out of the box. Whether you are making cinematic, lo-fi, ambient, or ethnic music, it will fit naturally into your tracks, adding a soft, organic character.

Freeware - Somerville Sounds Gentle Vibes VSTi Plugin

https://somervillesounds.com/gentle-vibes/

Gentle Vibes captures the soft, delicate tone of vintage vibraphone mallets and reimagines them as a dreamy, lo-fi instrument. Originally released as a Kontakt prototype, this standalone plug-in has been thoughtfully rebuilt with expanded controls and a sleek interface. Subtle tape-style wow and flutter, adjustable tone-shaping filters, and a uniquely expressive sustain function allow for deep customization—without sacrificing the warmth and simplicity at its core. Whether you’re scoring an intimate moment or layering textures into a lush soundscape, Gentle Vibes offers a nostalgic, vibey palette designed to inspire.

Freeware - Orchestral Tools Berlin Free Orchestra SINEplayer VSTi Plugin

https://www.orchestraltools.com/berlin-free-orchestra

A complete sampled orchestra in pro-grade quality. Whether you’re starting out in film music, an experienced producer looking for orchestral sounds, or just orchestral-curious, Berlin Free Orchestra checks all your boxes. Download with the free SINEplayer.

Features:

Complete symphony orchestra 

20 solo instruments 

 13 instrument ensembles 

 67 articulations 

 4 expressive legato soloists 

 Round robins and multiple dynamic layers on strings and brass 

 Full range of standard orchestral instruments 

 Includes pitched and unpitched percussion 

 One professionally mixed mic mix 

 6.4 GB of samples uncompressed, 3 GB when installed 

 All instruments taken from the Berlin Series

Freeware - RipplerX Physical Modelled Synth VSTi Plugin

https://github.com/tiagolr/ripplerx?tab=readme-ov-file

RipplerX is a physically modeled synth, capable of sounds similar to AAS Chromaphone and Ableton Collision.

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 - Bipolar Audio BP-909 VSTi Plugin

 https://unableton.com/b/fX4PJ

Roland 909 plugin

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 - creatools KEYS VSTi Plugin

https://musictop69.wixsite.com/creatools/keys

Acoustic, electric, electronic and digital keyboard samplemaps packed in an instrument with enough tools to allow you to freely edit, combine, modulate and mix them in creative and original way. ​

 Designed to help you synthesize your own original authentic sounds, configure and control them easily with your MIDI controller,​ use compression, saturation and convolution resonance to shape them to your taste and needs. Add reverb and delay for more depth, and use global filter to cut or emphasize acoustic aspects of your sound

Freeware - Physical Modeling Virtual Guitar Instrument VSTi Plugin

https://weonix.github.io/Physical-Guitar-ICMC-Demo/

International Computer Music Conference 2020 

Guitar Virtual Instrument using Physical Modelling Synthesis with Collision Simulation 

Department of Computer Science and Engineering The Chinese University of Hong Kong (CUHK)

Freeware - Wave Alchemy Triaz Player VSTi Plugin

https://www.wavealchemy.co.uk/product/triaz-player/

Triaz Player is a 100% FREE plugin and sample player, based on our advanced drum production plugin, Triaz. Get access to 4,000 award-winning drum samples and 200 inspiring presets. Import Triaz Expansions, and tweak, effect, mix and master your beats to perfection. Export your beats with unrivalled flexibility. Drag and drop audio stems, full mixes, one-shots or MIDI directly into your DAW. Available now as a free native AU, VST3 and AAX plugin for macOS and Windows.

Freeware - Somerville Sounds Assorted Instrument Plugins

https://somervillesounds.com/prototypes/

Soft Drums Lite

Dusty Felts Piano, 

Antiquarian Echoes Ambient Guitars,

The Meyer Choir

Rubber Bridge Plucks

Freeware - CutterMusic Revitar 2 VSTi Plugin

https://www.kvraudio.com/product/revitar-2-by-cuttermusic

Revitar 2 is a guitar synthesizer and can produce a wide variety of guitar sounds and playing styles. To achieve added realism and playing flexibility, Revitar employs unique guitar pick, string and body simulations. No samples are used in the entire process, so no two notes ever sound the same.

Freeware - WOK Cromina String Machine VSTi Plugin

https://www.kvraudio.com/product/cromina-string-machine-by-wok

Cromina String Machine is a physical modeling recreation of the electronic strings sound of the '60s and '70s. Solina, Crumar and Logan were the names which made it possible for bands to bring a string orchestra on stage or into the studio - the sound of these electronic keyboards featured on many songs of this era. WOK says that the sound-wise peculiarities of the frequency divider circuit and the BBD modulation section can not be successfully recreated by sampling, so they developed a plug-in with the main emphasis on the reproduction of this typical influence on the sound. Though the drawback is a higher CPU load, it gives a much better reproduction of the original sound. Although this plug-in has its focus on the typical Solina sound (including a phaser and delay effect), it can produce a wide range of typical sounds by using the integrated equalizer, vibrato, envelope variations (including a piano envelope) and other tuning controls.

Freeware - Slapassound Rudy Ruler Lite VSTi Plugin

https://www.slapassound.com/rudy-ruler-lite

Sampled instrument made out of a ruler. Free version.

Freeware - TX16Wx Software Sampler VSTi Plugin

https://www.tx16wx.com/

TX16Wx Software Sampler is a plug-in for the creative musician, inspired and modeled after the best hardware samplers with all the ease and new exiting features of modern software.