Catspaw

I have to recommend everyone's Ravelry recommendation :-) I'm archerygirl over there. You can browse by yarn weight, style, free, online - whatever. The great thing is that you can see people's comments on the patterns and it links to everyone who has used that pattern in their projects so that you can see what it actually looks like when real people rather than trained professionals do it. The forums are also great for getting recommendations on patterns and yarn and so on.

It's a great site :-)