I actually prefer this over my Korg CA-20 chromatic tuner. Not only is it free it's accurate.
Price: $0.00 (new)
Where Obtained: Downloaded from Site
Suitable for all skill levels of guitarists
This little program is one I found on the web. Its a needle guage chromatic tuner. I downloaded it. The install was simple and voila - a chromatic tuner ready to go.
You just put your guitar near the pc's mic and pluck the string and watch the needle.