TinySong is a simple tool that does one thing well. With the service you can type in the name of a song you would like to hear, then get a short URL in return. Email the URL to someone and when they click, they're taken to a media player where the song immediately loads and plays in its entirety. There are some major artists missing from the index, but chances are, you'll find what you're looking for.

The system works with Grooveshark, a nice music service that lets users create profiles, playlists and share playlists with friends, among other useful features. Songs can be downloaded and purchased through the site.