RocketCake is a free web editor for creating responsive websites for beginners and professional web developers. No programming is required.

It can be used as a WYSIWYG editor, allowing you to edit the website as it appears on your device. Switch at any time to view and edit it as on any other tablet, PC, or mobile. It is an excellent choice for users with little or no programming since you do not need to learn HTML or CSS. Just click, drag n' drop, or type. But it does allow you to use your code if you choose.

The RocketCake editor will produce clean HTML/CSS code, and you also can use it as a base for your more complicated websites or templates for your server scripts. Easily specify your break-points to adjust the website just as you like. Additionally, a professional edition includes options for inserting custom CSS, HTML, JavaScript, PHP code, user-defined break-point code, and premium support.