World Music Composer is a nice tool from the National Museums of Scotland to learn about musical instruments and how they sound from around the world. You can mix-and-match them to create your own collection but, unfortunately, you can save it. I’m adding it to The Best Sites For Learning About The World’s Different Cultures.
I learned about it from Show Me, the recently refurbished site where many United Kingdom museums share their games and interactives. I’ve added that site to The Best Collections Of Online Educational Games.