Use APKPure App
Get Halo Style - FN Theme old version APK for Android
Enjoy millions of the latest Android apps, games, music, movies, TV, books, magazines & more. Anytime, anywhere, across your devices.
A theme by Antonio for the app Floating Notifications.
You can find Floating Notifications on the Play Store here:
https://play.google.com/store/apps/details?id=robj.floating.notifications
You can find many more of Antonio's themes for Floating Notifications on XDA here:
http://forum.xda-developers.com/showthread.php?t=2283623