I'm going to break up the Equinox Sounds pattern here by announcing my first ever VSTi/AUi plugin called Thales Model I:
Thales Model I is a virtual plugin for Windows VST (32bit & 64bit), Mac OS X VST and AU. Thales Model I features the sound generated by early sixties computer. The sounds have been sourced in public domain films, which means that they are not clean: tape noises and background hiss are part of the sound of this very special rompler. Because of this, Thales Model I's tone is reminiscent of the mellotron.
Audio demos:
https://soundcloud.com/samplesciencemtl/sets/thales-model-i-demosBefore buying the plugin, I suggest that you test the 4 tones demo version available at Archive.org to make sure Thales Model I is compatible with your setup:
https://archive.org/details/ThalesModelIDemoTone list:
01-WINDORGAN
02-CHURCHORGAN
03-REZORGAN
04-OLDHORN
05-SQUAREWAVE
06-SPECTRALWAVE
07-DAFTWAVE
08-SINEORGAN
09-LIGHTWAVE
10-THEREMIN
11-REZWAVE
12-OLDSINE
13-PHONERING
14-PHONEORGAN
15-ATMOPAD
16-DUSTSQUARE
17-SMALLSINE
18-SINEWAVE
19-GHOSTORGAN
20-DEADORGAN
21-TELEPHONE
22-DUSTHORN
23-TWISTEDSQUARE
24-DEADLANDSCAPE
25-SINEPLUCK
26-METALBIRDS
27-UFOCPU
You can buy Thales at Sampleism for £9.99:
http://www.sampleism.com/samplescience/thales?sk=avBecause Thales Model I is based on very old computer sound, the tones are simple and often sound "organ" like. Most of the sounds are looped and the full product includes all the version of the plugin (Windows and Mac files, 32bit and 64bit VST plugins and AU) as well as a manual.
Note that Thales Model I has been developed with Maize Sampler and tested on Windows 8 and Mac OS X using FL Studio and Reaper.
If you find bugs, send an email with all the details (your OS, which version of the plugin you use) at samplesciencemtl (at) hotmail (dot) com