The term responsive web design means new techniques used to create websites resizable to any resolution and device. With the new HTML 5 and CSS3 this technique has reached the pinnacle of its own diffusion: thanks to responsive web design way don’t need a different web site for smartphones. The future of websites are HTML 5, CSS 3, jQuery and technical Responsive.
For all of those who are not good enough to develop completely from zero their own HTML5 website (and of course for those who want to save time) there are several websites who give accessibility to ready templates to download for your website.
Themeforest.net, for example, gives professional HTML 5 layouts, which are compatible with all browsers and all devices. Prices for standard websites are about $15. The code is very clean and websites are very light, which is always best also for SEO purposes. You can also choose templates for the most known CMS, such as WordPress, Joomla and much more. Templates are divided into categories, such as travel, business and technology.
For those who do not want to buy a theme zerotheme.com is a good website, which has a collection of smaller free HTML 5, CSS 3 and responsive templates. For developer, the HTML code is commented enough to make it clear and understandable to most people.
Even if you want to develop starting from zero your own website you can use those websites to have an idea of what can be done using HTML 5, CSS 3 and jQuery. We just need to wish you good developing.