During my trip to Sweden last month, I was introduced to this new app on Midsummer Eve that was the life of the party. For iPad only and developed by Swedes (as is a lot of music software), this beautiful and simple app allows you to mix songs like a pro DJ from your iTunes library or Spotify and keep the party rolling. The interface is stunning and the basic app is free (more effects come as upgrades). It allows you to make loops, scratch, and sync your songs so that you can throw the beats of one onto another and move back and forth with ease. This is a great new toy for summer parties.