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Историческую версию Multi Windows -Floting apps -multitasking for apps можно получить на Android
Плавающие приложения - Multi Windows
Multi screen multitasking app with floating windows app helps to stop switching from one app to another. Extremely powerful floating menu for all windows app with movable & resizable quick launch icon. Move windows by simply dragging their title, resize them by dragging their bottom bar. Maximize the floating app to utilize the whole screen. Minimize it if you don't need it now, when you minimize that time floating button helps to re - open minimize window with your current work.