Whenever a new version of a phone comes out, there's always that one cool feature you wish you had on yours. For me, that's Group Play.
On the Samsung Galaxy S4, you can easily share music, games, photos, and files to multiple devices using Group Play. While my older Galaxy S3 does have this option, it requires all users to be connected to the same Wi-Fi network, and even then it doesn't play nicely with newer devices (e.g. GS4, Note 3), or at all with other Android devices.
Thankfully, there's a way to get real Group Play functionality on the GS3, no Samsung involved. It can be done using an app called Chorus by XDA developer rahuliyer95. This app mimics Group Play by turning multiple devices into one big stereo—no matter if they're Samsung devices or not.
Chorus lets you share music to an unlimited amount of devices using just a Wi-Fi connection. So, instead of listening to "Wrecking Ball" by yourself, you can share the joy of Miley with anyone using an Android device around you. KitKat support is coming soon, and you must be running at least Android 2.3.3 to get started.