Anyone know where I can find a decent additive synth VSTi that doesn’t cost an arm and a leg (or is free)?
This one is free, and, QUITE flexible…
I’d say you could get mostly whatever sound your heart/ears desire
http://www.kvr-vst.com/get.php?mode=show&id=203
Check it out, HOMEBOY!!! Shiiiiii…
~Dufey (Ol’Skoo Music Makah)
Oh, oh, one more thing, check out the “links” page (at the top of renoise homepage) to find more fun synths! 
Triangle II is very good, but it’s subtractive not additive.
Unfortunately, I don’t know of any decent free additive VSTi’s
Hey thanks guys.