You've probably seen the article in Knitty about the Knitter's Geek Code. These pages make it easier to create your own or view other knitters'.
All of these programs are in a beta state. They won't harm your computer in any way and they'll mostly work, but there are some loose ends I haven't found yet and the interface is kind of clunky. I expect to have things much tidier soon. If you want to give me feedback (thanks!), there's a mailto link on the information page.