Typically there are plenty of cool Android App out there and most importantly they are free. One of my favourite is SoundHound
Music is my life and I can't live a day without music. Thus when I heard something nice I need to know who's the artist and what's the song title. Thank God Soundhound is the guru of music library and it would find and match it even with just a HUMP. With Digi Smart Plan, I can get not only the song title I can also get lyrics that come along with!!!