You may have had the experience of trying to identify a beautiful piece of music whose title you don’t know. The Internet cannot help with this, since you can’t search for music when you don’t know the name. Or so I thought.
It turns out you can identify a piece of music online, using the Parsons Code, a simple up-down-repeat code for the structure of the melody. That is, you don’t have to know the notes; you simply punch in whether each note is higher, lower, or the same as the preceding note. If you enter a large enough number of notes, you are guaranteed to identify the piece you want, in my experience. Furthermore, even when it doesn’t nail down the piece uniquely, it does give you a short list of options to chose from, and you can quickly search through those yourself.
You can also filter by folk music, religious music, rock/pop, classical, etc., to narrow the search further.
Check out Musipedia.org.
Alternative link: http://www.themefinder.org/