Extract MP3 from Youtube videos

Maybe you've had a situation when you saw a nice video on YouTube but didn't know the name of the background song, you watched a music video or there was a cool remix you never heard before. A few months ago I found this useful tool called "Freeware Youtube to MP3 converter". How it works and what it does? You type in the YouTube link and after some minutes you get the audio file of it. Of course the audio quality is not that good but for some playing around it should work fine.

And here you get it.