If Burt Bacharach was still writing songs, he probably wouldn't write "What the world needs now is weather apps, sweet weather apps." After all, a day doesn't go by where yet another weather app is unleashed on the planet. But I have to admit, Yahoo did an incredible job with this app.
Launching Yahoo! Weather for the first time, the app determines where you are and then pulls a Flickr image appropriate for the location and weather to be displayed on the screen. Those images change with changes in the weather, so you'll usually know at a glance what's going on in the great outdoors.