Platform: iOS; Free

Spacebar fixes the age old problem of not being able to make it to your favorite concert. Users can by an "audio ticket" that gives them access to a live stream of a concert, which starts at about $.99 a pop. If you enjoy the show, you can even leave a tip to an artist you find deserving. Don't worry, the app gives you a free five minute preview of the show before you pull the trigger and buy a ticket. Even better: listen to the preview, and if you're close by, just go in and join the concert.