Have a promo code for the app Weatherwise
which gives you 3 free themes. If you are into Dr. Who, Game of Thrones or Marvel Superheroes, give it a try, it's an interesting twist on weather.
The app itself is free and in the theme store, you go to "Get free themes" then type in the promo code august2014
The themes will be available to download after it unlocks them. Feel free to share with anyone you'd like.
I've attached some screenshots so you can see a preview of the themes.