Ever have a song stuck in your head, but you don't know the name of the song or the artist?
Yeah, who hasn't.
All you've got is the tune - the notes - and it's driving you crazy trying to remember the name of the song and/or the artist. You're out of luck, because you can't Google the notes...
Here's what you do - set up a website that tells people the name and artist of any song based on the notes. You can hire a guy who knows everything about music for $10 an hour - with the right ad, you'll be flooded with applicants. Then just charge people .99 or $1.99 to have their song named. They can just call a number on their cell, hum the tune, and get the name.
Since each connection will probably take no more than a minute or two, it's about 50 bucks an hour with one guy working. With two working and more visitors, it's more money.
You could even have the questions answered by automated software, although this would probably cost more than just hiring someone.
Anyway, there's today's free idea. Have fun.