Google announced the developer preview of its next Android version i.e. the Android L Developer Preview. It has got some new features the main change is UI overhaul. UI is flattened now. Of course it has introduced all new apps.
Android L apps are now available to download for older Android versions as well. The apps were posted in a thread on XDA-Developers forum. Some applications like Google Earth, Google Chrome and Calculator does not work on older versions. But other apps like Google Home, Google Now, YouTube, Play Music, Play Services, Play Store, Search, Sound search, Gmail, keyboard, camera, and clock applications do work on Android 4.0 Ice Cream Sandwich and above.
There is a seperate link of new keyboard. To download other apps go to the source link below which will take you to the XDA-Developer thread where you’ll be able to download the files separately or in a bulk. The bulk of all apps is a zip file of about 150 MB. Download the apps now and enjoy Android L apps.