Just out of curiosity, but how many times do you check it per day? Because if it is only let's say 10 times, finance.yahoo.com is all you need, that shows the real time quote and free.
I checked the ones in my previous link, and none of them are real time. I also checked download.com but looks like you won't find any real time AND free. I think legally they can not give away such info for free, plus if there was one, it would become so popular, that it would be silly to give it away for free...
There are a few for a small price, keep googling it and test them....
Edit: I think I have found a solution!!!
Google finance is actually also real time and what is even better, it refreshes in every 5 or so secs by itself.
1. So open up a browser what you usually don't use.
2.Go to finance.google.com and put the symbol in.
3. Minimize the window to 3 by 5 inches and that still shows the price.
Now you have an almost real time, always refreshing ticker for one stock. If it wasn't refreshing you could still use an automatic refresher, but as I said, it does it by itself....