It's in nova launcher and it's extremely handy. With one hand. Swipe up to open app drawer and swipe down to search, then type name of app. Easy.. You can set navigation on the home pages but not in the app drawer.
I use sipe down for notifications on the home screen, swipe up for app drawer on the home screen.
I realise i can use 2 finger gestures, but that can't be done with one hand.