Weather HD is, you guessed it, an app that gives you information about the weather in your area. But what makes this app unique is its animations. For example, if its cloudy in your area, you'd see something like this:
This app is very well designed and useful. I don't use it that often myself, but when I do I get very useful information from it. I actually like it better than the iPhone/iPod touch's native weather app by Apple.
Overall, Weather HD is a great option for you if you want to try something new instead of using Apple's weather application. The interface is smooth and clean, although ads may get in the way of your experience sometimes.
Here's the link to download Weather HD for free - http://itunes.apple.com/us/app/weather-hd-free/id412489722?mt=8&uo=4
Thanks for reading!