Ravelry is a great option for knitters (and crocheters) who are looking to share their work, see others' work, use free patterns (or buy paid patterns), or just chat about knitting in general. There are thousands of patterns for many uses. Ravelry works as a social network for knitters. The web address is ravelry.com .
An account is necessary to access Ravelry. You simply need an email and password to access, and you can download as many patterns as you want.