11. Msnbc
Following a similar presentation style as the Guardian's mobile site, Msnbc separates categories via a series of bars as you scroll down the site in a linear fashion. However, an interesting touch is that by scrolling up when you visit the site, you expose a hidden list of category links.

12. Vimeo
On the face of it, video sharing site Vimeo looks pretty similar to YouTube's mobile offering. A closer look reveals that the Vimeo team has simplified things even further, and identified - on top of viewing video - three key site interactions: Like, Share, and Comment. Beautifully executed.

13. Yahoo
Yahoo deserves particular credit for trying something slightly different with its mobile site. Rather than simply present text links to stories and news, Yahoo's developers have created a story carousel at the top of the page: it works very well, and enables Yahoo to present its more image-driven content.

14. Flickr
We're back with the Yahoo posse for this entry, and as any Flickr user will know, being able to access your photos on the move is a fantastic option. Depending on how you use Flickr, the key sections are exposed via Activity, you, and Contacts.

15. Google
This is slightly unfair for Google, as we've lumped all their mobile offerings under one entry. Search, Gmail, and Maps are just some of Google's mobile-optimised websites and apps, all of which you should check out.

16. Digg
Despite Digg's mobile site being easy to use, and often held up as an example of how a complex site can be presented on mobile (and rightly so), there is simply too much pimping of the company's mobile apps. It's good to make people aware, but Digg goes that step too far.

17. Ebay
User experience is a key part of any mobile project, but there are some companies that know their audience so well, they can identify - by and large - exactly what it wants. Ebay is one such company, boasting great apps, and a mobile site that provides the functions eBay users expect.

18. Wapedia
Wapedia offers a mobile-friendly gateway to Wikipedia's 10 million-strong archive of content. Search takes top billing, and content is then presented in a single column, making it perfect for viewing on mobile devices.

19. The Onion
When it comes to satirical news, The Onion is the top of the class. This mobile site features the top Onion articles, as well as video that's also formatted for use on devices such as the iPhone and iPad, which don't support Flash.

20. Colly.com
This site from top designer Simon Collison is the only personal portfolio in our list, but is featured for its use of media queries (the new CSS technique we mentioned earlier). Though not perfect for every project, media queries enable you to create one site, and then serve different elements based on a visitor's screen size. A great technique for more personal projects, it's definitely worth reading up on.

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Liked this? Then check out Mobile web design: platform by platform and PhotoRadar's 10 best free iPhone photo apps.
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