Personally paid for Niagara launcher as I find that to be the far superior launcher to any other I've tried. My second one is Symfonium, the most feature rich and well developed audio player.
Paprika app. Helps us meal plan and be prepared for the week. Cloud sync with my spouse, shared grocery list, calendar, pantry tracking, recipe scaling, and many more features. The best feature however, is that the screen does not go off while you are cooking.