wmWeatherApp is nothing more than a very simplistic weather dock app.
This application simply grabs the image of the current weather (using your zipcode which you supply as a parameter to wmWeatherApp) and displays it as the background image of the dockapp.
You can left click on the dockapp and have it launch a web browser (which you can configure by setting the environment variable BROWSER) and show you the weather.
Quick usage instructions:
./configure && make && make install
wmWeatherApp -zip 61832 -delay 300
-zip specifies your zipcode
-delay specifies the update interval in seconds. 300 seconds is what I currently use.
The weather image is pulled from www.wunderground.com (which is the most reliable weather provider I have found). License is GPL.