Apple iTunes compare

With its enormous catalog of on-demand streaming music and its built-in social features for discovering new tunes, Spotify is an absolute must-have for audiophiles and casual listeners alike. But free users, beware of intermittent eardrum-piercing ads.

With an elegant interface, weather information, and interactive maps, Yahoo Weather is a must-have for weather watchers everywhere.

Amazon Instant Video is only instant if you're a Prime subscriber or once you've already purchased content from Amazon's Web site, but the lower cost for some videos might make it worth your while.

If you don't mind the limited streaming library, the Netflix app is a great way to watch movies and the new interface elements make it easier to use.