I ran across this free synth from NUSofting this morning. Nice for the price!
 
A couple of notes:
 
1) On install, you are only prompted for one VST folder. It places both the 32- and 64-bit .DLLs in it. I installed to my 64-bit VST2 folder and just deleted the 32-bit version. If you need both, you'll need to copy the entire SINNAH directory structure to your 32-bit folder, and delete the 64-bit version. You will need to manually sync any presets you change/create.
 
Speaking of which...
 
2) Don't forget to download Julian Ray's free presets for SINNAH. There are some really good ones. There's a link at the top of the SINNAH page, but I'll also provide it below, along with the link to SINNAH. Note that the distribution file contains the 50 presets, with no installation instructions. I guessed wrong the first time. There's a PRESETS folder under the SINNAH folder in your VST folder. There is a FACTORY folder under that. No, you don't create a USER folder at that level. SINNAH opens inside of FACTORY and provides no way I found to navigate up to PRESETS, so I created a "User - Sinergy by Julian Ray" folder under FACTORY and copied the unzipped presets there. That worked fine.
 
SINNAH (scroll down past the release notes for a description of the synth; it's an interesting approach)
http://www.nusofting.liqihsynth.com/Sinnah_VA_synth.html
 
SINERGY presets for SINNAH by Julian Ray Music
http://www.julianraymusic.com/sound/sinnah/main.php
 
Audio example using SINERGY presets (Exile by Julian Ray Music (for OSC #86)
https://soundcloud.com/soundgalactic/julian-ray-exile-osc-86-sinnah