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
i have selected 7 free drawbar organ VSTi emulations of the Hammond B3.
Let’s groove :
1. AZR3 by Rumpelrausch
Ample Guitar M Lite II. This little plugin surprised me quite a bit, mainly because it’s an acoustic. It is also one of the best free VST Plugins for vocals. T Rack Classic EQ. This is another free product from ikmultimedia, this time in a 6 band EQ from T Racks. Its a nice sounding EQ on most audio material but I think it’s best suited to acoustic guitars and rock vocals. I would say it’s one of the best free vocal VST plugins 2018 brought us. VST 4 FREE - Free Audio Plug-ins and Archives. Free VST downloads: Digital Acoustic (Nylon strings guitar by TED) - Spicy Guitar (Physically modelled acoustic guitar by Keolab) - ABPL II (Precision. FREE VST PLUGINS Audio Tools. Free music production software (Multitracks) for sound editing or manipulation for download. Size 66.3 MB Sonar is a. Sonar (64-bit) hangs while trying to auto detect the 64-bit versions, but the 32-bit are knocking my socks off, and run under both Sonar x64 and x86, with or without jBridge. I managed to trick Sonar into loading the 64-bit dlls, but as soon as you close a project, they hang again. Other than that, these plugins rival anything I've ever paid for. Definitely one of the best free VST plugins you ought to have in your VST rig! 33) MX Project T. Rex 606 Modelled after the vintage Roland TR-606 drum machine of yore, The T.REX 606 is a beast in its own right with some added bells and whistles.
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
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
Free Vst Plugins Sonar 777
Oddly Organ
A little more synthetic, you can go creative with this VST !
You can also find other organ VSTis made by OdO
7. VL122 by AM Music Technology
Free Vst Plugins
info & download
Cakewalk Vst Plugins 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.