Crunchyroll.com is a website that you can watch English subbed animes such as Naruto, Fairy Tail, Bleach, Reborn, and many more.
You only have to sign up to watch if you want the premium membership in order to watch episodes the day they come out and to avoid advertisements during your show.
So far, its one of the most reliable websites for watching anime that I know. Not to mention its got the widest collection of anime shows.