Can anyone recommend a nice, natural sounding chorus vst? Preferably for free 

http://www.kjaerhusaudio.com/download.php#free

I use them on almost every track

I already have these, but thanks. These are good, but a lot of times they sound a bit too 'metaly', sometimes they don't. I guess I just have to play around with the settings.

how about this one.. I got a free trial.. I think it's a very nice effect, (compares well with the one that came with cubase 5. Has a real nice shimmer chorus , and it's real easy to use.

http://www.audiodamage.com/effects/product.php?pid=AD017

I don't know if there are any "free" versions out there, You'd have to do the looking around.