There is always Gweather, which is the daddy of them all.
Kweather is the bastard child of Satan, thus Karamba ensues.
I give wmweather props though. Nice Window Maker add in.
For our OS X cousins, Weather Grok, WeatherPOP, Meteorologist (which is totally free), or WeatherManX. -- root sounds cooler than administrator anyhow What this country needs is a good five dollar plasma weapon.