Microsoft suddenly seems to have taken much more interest in the android platform. Launching new apps, adding new features to previous apps and so on. One of the newest apps is the Arrow Launcher.
It is still in BETA stage, so still many new features are missing. For example, no icon customizations etc. But still, it offers some intuitive features. for eg : Swiping left from the home screen opens up the recent contacts. Simple, but very effective.
Below are some screenshots. You can download the app from here.