On April 21st 2015 – Google will release a new update that will penalize sites that are not Mobile Friendly.
The video below will show you how to make your html sites mobile friendly.
Learn How to make your WordPress sites Mobile Friendly – click here
Download the software: click here to download the zip file
Note: Windows based software. Just enter a name and email to request a license ID
Download the code: click here to download text file
Another great site : TechAlp