How to Install Android L’s “Material Design” Apps on any Kitkat devices

Google has released its Android L developer preview to Nexus 5 and Nexus 7 (2013) users. For now the build is limited to these 2 devices and so every user wants to try it. Thanks to a couple of senior members at XDA-developers, who have extracted many apps from developer preview which are ready to be used on any device running on Android Kitkat.