If like the new stock apps in the Samsung Galaxy Note 3 but do not want a huge device, you can load them on your Galaxy S4 phone. All work, as expected has been done by an XDA member. Some of the Samsung apps like Magazine, My Files, updated Camera app, Samsung Knox have been made available for download.
Some apps that are Android 4.3 would not work on Galaxy S4 as it still runs Android 4.2.2, however if you can install an Android 4.3 ROM on it, you would not face any problems. However, some of the apps are designed for Note 3’s screen size and they may not display that nicely on GS4. So, if you prefer GS4’s screen over Note 3, you would not miss the new updated apps by getting the APKs from here.