The best free stock-screener is considered to be the MSN deluxe screener.

http://moneycentral.msn.com/investor/controls/finderpro.asp 

I've never used it, but I've heard it is by far the most powerful.

If you're interested in growth, you can do combinations like a certain percentage YOY growth combined with a projected 5-year growth, combined with a certain ROE, combined with a certain PEG. etc. etc.  Basically, whatever you want.

I've come across simpler ones that included PEG, but I haven't bookmarked them.  But if you google on "stock-screener", you'll likely come up with several you can try.