To a surprising lack of any kind of Metaio inspired fanfare, Junaio 2.0 arrived in the iPhone store (Android version coming soon). The new version of Junaio is a huge upgrade over the previous version, Junaio is now a full augmented reality browser, as well as creating 3D content you are now able to find your nearest restaurant, nearby tweets etc. Junaio 2.0 also has augmented reality marker recognition functionality. It's all great stuff but the silence is deafening, we just cant help but wonder if 2.0 slipped out as an accident.

Layar was pulled from the appstore a month or so back but makes it's return with version 3.0. An update with new 3D layers. Has it been worth the wait? Layar fans may want to skip today's blog and get themselves a cup of coffee.

If you have an idea for a new layer but have been put off developing it because there is no revenue opportunities then good news. Layar announce that from mid March developers will have the option to produce both free and chargeable content. Layar are making a serious bid to become the augmented reality application store for all devices.

Say augmented reality to any iPhone owner and they'll say Wikitude or Layar. A detailed scan through the appstore shows there are more browsers than any other category of mobile augmented reality application. We continue the ultimate guide to iPhone augmented reality and focus on the augmented reality browser. Are there any threats to the Wikitude crown? What's hot and what's not.

Building augmented reality applications presents developers with a unique challenge. How do you build a user interface that presents a large amount of data to users, data that needs to reflect distance and location, and may have multiple data in the same location. Visually laying out that data is challenging. We look at some of the unique approaches some developers are taking to solve this problem.

I was on holiday when WhereMark hit the iPhone store in December but I was in contact with the developers back in September when they released a preview video to Youtube and remember being excited about it. Having had a chance to test the released version I have to say they have done a pretty good job and lived up to my expectations.

Wikitude 4 has hit the Android and has numerous improvements. Firstly Wikitude 4 supports miles as well as kilometers so no more wondering if 7.5km is to far to walk. I'm really happy about this change and I'm glad my nagging has paid off. Wikitude 4 also boasts many new features and a UI refresh which looks really cool.

Toozla have just announced the launch of what I think is the worlds first augmented reality sound browser. It works just like Layar or Wikitude in that it uses location based services to determine your current location and then depending on what channels you are subscribed to will give you an audio commentary. The channels include a Tourist channel for finding information on nearby landmarks, a Services channel to receive promotional information from shops and business and a Weather and Chat channel

Until today, Symbian users have had very little to shout about when looking for augmented reality applications, but the good news is if you are a Nokia 97 owner you can now download Wikitude from OVI.

Layar 3.0 is now available in the Android Marketplace. The Beatles Tour developed by a London based company and fellow augmented reality blogger is one of the most exciting launch layers available. Start the tour, and you are guided to the first location where you have a unique picture opportunity with Ringo, Paul, John and George on the famous zebra crossing in Abbey Road

WorkSnug goes beyond just pointing you to the nearest coffee shop that has free wireless access as the team have actually visited many of the location and rated them for noise levels (no one wants to work in a really noise environment) as well as useful information like the availability of plug sockets so you'll never be without power.