There is this website: http://www.justinguitar.com/

I used it a couple of times but then I started getting lessons from a teacher. I would eventually recommend doing that because while you could learn using websites, you can’t get feedback from a computer to tell if you are doing the right thing.

When you are a little more confident in your skills and you understand how to read tabs, you could try this site: http://www.ultimate-guitar.com/

You can search songs from your favourite singers or bands.

Hope this helped!
References :

I second the opinion to get a teacher in your area. They will help you learn much faster than online lessons will. But if you’re looking for some basics to get you started, check out:

http://www.findguitarteachers.com/guitar-lessons.html
References :

Hi,

You can check out my blog: http://www.learn-acoustic-guitar.com. Lots of free lessons there including step by step videos.

Enjoy and best of luck with your guitar playing!
References :
http://www.learn-acoustic-guitar.com

Not that I know of.
References :