World Weather Info - New weather service, where you can not only check the weather forecast, but also take part in its creation.
Thunderly - Experience real-time lightning from anywhere on earth
Dark Sky - Hyperlocal weather information, now on the web ⛈
Cloudnerd - Cloudnerd is a web app that allows users to predict the weather, with an accuracy rate of 84%, by scanning clouds above their heads.
Hello Weather - The amazingly accurate, perfectly powerful, seriously simple weather app.
CARROT Weather for Mac - A smartass weather robot with a personality