Leena Desktop UI (Multiwindow) gives you desktop operating system experience to your android device by extending Android with a native desktop user interface. The best thing is; it has multiwindow feature and no root needed, you can download this app from google play store for free, I used this app and feel something different in my devices, yah it’s a good experience of desktop in android phone.
Key fature
File manager
Multiwindow
Landscape mode
Web browser
Launcher app
Video player app
Image viewer
Several web apps