Samsung releases a new Good Lock Module, MultiStar. Can force any application to splitscreen and keep both windows active. (ie: netflix in splitscreen, or play 2 games at the same time). :
Voice Search 2.1.3 (arm) (Android 2.2+) APK Download by Google LLC - APKMirror
NiceLock for Samsung 2.8.25 APK Download by Blue Horizon Apps - APKMirror