Today in the world of web design and development everyone is talking about is Responsive web design. As there is a growing necessity for people to interact with the web by using various devices, starting with mobile phones and ending up with tablets and notebooks, a question of responsive design becomes very urgent.
Responsive design simply takes away the need for mobile versions of your site, and with the use of standards they typically work in a way that makes your site future-proof for new types and sizes of devices. Having a responsive design allows your website content to be displayed correctly to all users by using fluid grids, images and queries to adjust the design to accommodate screens of different sizes using media queries. The cool thing about responsive themes is that they allow you to have one theme to maintain and one look and feel no matter who is visiting your site.
Thereby, we’ve decided to search through the web to find the best and high-quality themes that WordPress community currently offers us for free download. In this blog post we’ve compiled free WordPress responsive themes that you might want to try for improving your web site.
Please leave a comment if you know other responsive themes that we missed here.
Do check: 100 Best Free WordPress Themes for 2012
Note: The themes below are all designed and implemented to be responsive. Please check the demos to ensure the responsive design fits your needs and that the required dimensions look good. One way to do this fast simply is to make the browser window smaller. Best solution however is to test on a tablet and smartphone before making the final decision. Keep in mind that responsive themes required a lot of effort to deisng, implement and that maintenance may be quite a job as well.
DailyPost
DailyPost is an interesting theme ideal for your everyday notes and thoughts, which supports post formats and several customisation options. The theme is a special one because of its responsive design, thus you will get the pleasure to read the post with your mobile device.

Balita
Balita WordPress theme, a theme dedicated to shops that sell products for children. The theme was designed by Tokokoo and released exclusively for Smashing Magazine and its readers. As usual, the theme is absolutely free to use for both private and commercial projects.

Bones
Bones is a Starter Theme built off the HTML5 Boilerplate. It features two versions (Classic & Responsive), an incredibly robust stylesheet, and detailed theme files. Best yet, since it’s not a Framework, you’re free to modify and customize the files as much as you like.

BonPress
BonPress comes with several custom widgets for Sidebar and Footer, like: Flickr Gallery, Social Widget, Twitter. The layout of this theme automatically adapts to fit on any screen resolution on desktop and mobile devices (iPhone, iPad).

Hum
Hum is a Twenty Eleven child theme, responsive by nature, and solely consists of CSS modifications.

Immense
Immense WordPress theme is ideal for photographers looking for a holistic photo portfolio and blogging platform that performs beautifully on a variety of desktop and mobile browser platforms, including the iPhone and iPad.

Mixfolio
Mixfolio is a responsive, HTML5 portfolio theme for WordPress. Best of all, it’s free! Use it to build your portfolio or your online brand. Create Image, Gallery, Video or Standard posts using Mixfolio’ Post Formats feature.

Paper
Paper is a unique style WordPress Theme, simple, character of this theme is use of school paper as background and usage of two letters of character sketches.

Photum
Photum is an HTML5 responsive theme for a Photographers portfolio. Created by Oli from WPLift.com.

Skeleton
Skeleton, created by Casey Lee at Simple Themes is a simple, responsive WordPress theme based on the Skeleton Boilerplate. It has several useful shortcodes, such as tabs, toggles, cross-browser CSS3 buttons, and layout columns.

Flexible
Flexible is a WordPress Theme that helps present your content and display it to fit different screens sizes, with a design of your own. It also provides a really easy integration with Facebook and Fan Gate option, a must have if you are running a website.

Yoko
Yoko is a flexible HTML5/CSS3 WordPress theme. With the responsive layout based on CSS3 media queries, the theme adjusts to different screen sizes. The design is optimized for big desktop screens, tablets and small smartphone screens.

Responsive Twenty Ten
Responsive Twenty Ten is a child theme of the default WordPress theme. This theme has been based on Todd Halfpenny’s Responsive Twenty Ten with the addition of some special touches such as flexible images, nice margins, and some mobile image rules.

Meerkat
The Meerkats Theme is built to respond to different platforms and devices. It is a simple and basic WordPress theme built by Gregor McKelvie.

SimpleMarket
SimpleMarket is a HTML5 WordPress theme. Responsive design that easily adapts to a variety of screen sizes and devices.

iTheme2
iTheme2 is a revamp of iTheme that was originally released by Nick La. It is the perfect theme for technology & Mac related blogs. It uses media queries to target different displays such as desktop, notebook, iPhone, iPad, and other mobile devices.

Whiteboard Framework

Foghorn
Foghorn is a minimalist WordPress theme built off the foundation of Twenty Eleven. It has a custom options panel for switching layouts, removing sidebars, uploading a logo, and changing footer text. It is also responsive, meaning it looks good at any browser width including iPhones and other mobile devices.

Foundation
Foundation, is a WordPress blank starter theme with the exceptional capabilities of ZURB’s Foundation Framework and HTML5 Boilerplate.

Ari
Ari is a minimalistic, flexible three-column blog theme. The theme uses CSS3 media queries for its responsive layout and is therefore optimized for tablet PCs and smart phones (the theme switches to a two-column layout when viewed on a horizontal iPad screen, and to a one-column layout on iPhones). You can also choose a dark color scheme.

Scherzo
Scherzo is a clean, readable theme that boasts a mobile first design, which means it displays perfectly on all mobile phones as well as desktop monitors.

Renova
Renova, a new single column theme for wordpress.The main design of renova is concentrated on a minimal style dedicated to those writers who need a simple layout without any kind of useless stuff. Renova was designed to perform well on the principal touch mobile device and tablets.

320 and up
Blaskan
Blaskan is a responsive and accessible WordPress theme that’s built for many kinds of screens.
Constellation
The Constellation theme is the perfect starting point for any WordPress project. It gives you the flexibility to provide bespoke styles for different devices, totally up-to-date HTML5 code which is fantastic for SEO, a flexible grid system on top of all the other goodness bundled in to the HTML5 boiler plate.

Codium Extend
Codium Extend is a very simple wordpress theme optimized for handheld and mobile devices (iphone, ipad, and smartphone).

Demo
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