We created a simple but useful Windows 8 app using HTML and JavaScript (and the new WinJS libraries).  You've seen me writing about some of the technical aspects here on the blog.  I'm very pleased that it passed the technical reviews from Microsoft and it's available in the Windows Store now.

Altitude for Windows 8 shows your current altitude (in meters or feet) and your current location (latitude and longitude and terrain map) based on your GPS, cellular, wifi, network, and/or internet connection. The values will then update based on either the time lapse or the movement threshold you choose in Settings. A live tile can optionally update with your current altitude. Finally, you can share your current location with other apps on your Windows 8 devices, like email, Twitter, Facebook, etc.

Landscape View


Snapped View




More information

Here's more information on Altitude and links to the support FAQs.