Google Docs allows you to transfer your documents without having to carry around a jump drive. It also allows you to save all the different versions of your documents in one spot. Another thing this site allows you to do is it lets other people like teachers see your documents without you having to e-mail them.

The genius application on iTunes shows you songs that you might be interested in buying based on songs that you already bought on iTunes. It also makes playlists for you based on songs in your library that sound good together.