Ravelry.com

This free members-only community includes a collection of free patterns, a discussion forum, and project gallery.

Knitty.com

This knitters' resource has plenty of free patterns to keep you busy. 

Etsy.com

A collection of small stores where you can buy a knitted item or just browse the latest knitted and crocheted fashions.This site also sells anything and everything handmade!

Roxycraft.com

A website full of knitting and crochet patterns (some are free!) geared towards the more contemporary and modern knitters.

Straw.com

Crystal Palace yarn's website. Here you will find their yarns and some great, free patterns

Cascadeyarns.com

Cascade yarn's website. A great resource full of free patterns, pattern websites, and info about all the different Cascade yarns.