S4 and Galaxy Note 3, though you’ll likely need to be using Android 4.4.2 KitKat for these apps to work.
Users on XDA report that S Health isn’t working, but the rest of the apps should work pretty well. All of them can be installed as normal APK files, though you might need to uninstall/freeze previous versions of some apps in order to get them to install successfully (which, if you hadn’t already guessed, require root access.) Oh, and naturally, the Gear Fit Manager app won’t be too useful unless you somehow have a Gear Fit in your possession, though you can still give it a visual walkthrough if you so desire.
Head over to this link to download the APK files for the aforementioned apps.