Google has recently announced Nexus 5 along with latest Android 4.4 KitKat. Nexus 5 comes with good hardware upgrades as compared with its previous version and in similar manner latest version of Android also comes with minor updates in UI.
One of the noticeable change is in Android 4.4 KitKat launcher as new launcher comes with some UI tweaks and some new features. Till now Nexus 5 is the only smartphone or device which runs on Android 4.4 Kitkat, but now you can try this new launcher on any Android phone running Jelly Bean.
To try this new launcher you have to download files from HERE and you will get three files ;-