Google has launched a new professional-quality design tool that makes HTML5 creative accessible to everyone.
Google Web Designer, a new professional-quality design tool that was developed to allow advertisers to easily create HTML5 ads for mobile and desktop.
The best thing is that you can get this design tool for free not like Microsoft & Adobe stuffs.
Visit for free download :- http://www.google.com/webdesigner/
Visit for Support & Manual :- https://support.google.com/webdesigner/#topic=3249465