The Hammond B3 organ.
Additive synthesis at its best !
Suitable for Jazz, Rock, Gospel, Blues, Ballad, House, Funk, Cheesy reprise of anything, Ballad, Dance, Pop, Hard Rock, etc.
Some history here : http://theatreorgans.com/grounds/docs/history.html + some facts

Vst au HaNon B70 emulates the famous Hammond B3 drawbar organ coupled with a Leslie 122 rotating speaker. It's based on the physical emulation of the 91 tonewheels, which rotate permanently at low CPU cost. Organ is a VST plug-in that allows you to recreate the sounds of the Hammond B3 organ on your computer. This virtual instrument also provides you with two additional electronic organs (Vox ad. This entry was posted in VST plugins and tagged B3, emulation, freeware, Hammond, organ on 18 November 2014 by Wavosaur. Post navigation ← 3 Stylophone VSTs! 4 Free VSTi emulations of Farfisa Organ →. “Sampleson teamed with Librewave, LalalandAudio and Studio427 Audio to create a studio-quality instrument. And will be free forever. CollaB3 features a detailed reproduction of noises, clicks, leakage, rotary speaker and tonewheel. Also chorus and reverb are included. Download now and enjoy! PRODUCT DETAILS-Virtual Tonewheel.

i have selected 7 free drawbar organ VSTi emulations of the Hammond B3.
Let’s groove :

1. AZR3 by Rumpelrausch

Not only free, it’s also open source.
This is a very good drawbar emulation, with onboard FX, nice saturation, and the speaker leslie emulation. Perfect for emulating gospel organ and rock organ. And check the “NHL” preset!

WhiterShadeOfPale
https://blog.wavosaur.com/wp-content/uploads/2014/11/whiter-shade-of-zr3.mp3

As all the other plugins in this list are 32 bit, it could be nice to compile a 64 bit version.
** EDIT** => here is the 64 bit version for Windows : download Azr3 B3 organ VST 64 bit
and the sources

There’s also a MAC version here

2. Organized Trio

Organized Trio VST

Present in the same package as “Mr Ray”, it’s the perfect companion for your funky tracks.
And of course it can do the perc dance organ “ala” Korg M1 :

Gypsy Woman:
https://blog.wavosaur.com/wp-content/uploads/2014/11/Gypsy-Women-Organized-Trio.mp3

Free Hammond B3 Vst Plugin

3. NubiPlus by fxPointAudio

http://www.fxpointaudio.com/ & download

Nubi Plus VSTi come with a VST FX for adding the Leslie effect : Spinner VST. The two make a super groovy combo, and gives you this nice Hammond B3 organ sound.

She’s just like you and me, but she’s homeless:
https://blog.wavosaur.com/wp-content/uploads/2014/11/Gypsy-Woman-NubiPlus.mp3

4. DirtBag and LightBag by Istvan Kaldor

LightBag II VST

Good old Synthedit creations : the sound is dirty like it should. You get a nasty B3 organ sound in an instant. Leslie speaker effect is included. There are also some nice reed emulation sounds. And some crazy wicked presets in dirtbag too!

Whiter shade of Dirtbag :
https://blog.wavosaur.com/wp-content/uploads/2014/11/whiter-shade-of-dirtbag.mp3

5. Euthymia VST by Iliadis

This free organ VST has a clean sound. You can add a Leslie speaker as free external effect : iSpinner VST

6. OddlyOrgan by OdO

Oddly Organ

A little more synthetic, you can go creative with this VST !
You can also find other organ VSTis made by OdO /vst-pad-synth-free.html.

Organ

Hammond Vst

7. VL122 by AM Music Technology

Vst B3 Organ Free Download

info & download

B3 Organ Vst Free Download

Discontinued & free drawbar organ : it sounds nice, it’s clean.
You can switch off the motor !
It includes the famous Leslie effect, and also a reverb.
+ a tube/drive effect for more dirty sound.
Cool jazz organ presets.