This apk taken from nexus 7 android 4.2, and it is a stock launcher. I have tested on my galaxy tab 2 10.1 running android 4.1.1 and it runs well, really fast and slick. Below is preview of my home screen. The stock launcher comes with wallpapers too.
If you want to try, download it from here
Instal just like the common apk.
Credit to dev @xda who backported this apk to android 4.1.1, source xda forum