Aviation weather and flight planning, including forecasts, observations, weather maps, DUATS briefings, icing, and turbulence.

Get METARs, TAFs, PIREPs, and weather charts on your mobile phone (and iPhone).

Displays live pilot reports, current and forecast weather (PIREPs, METARs, TAFs), temporary flight restrictions (TFRs) with optional radar overlays using Google maps.

The National Weather Service's aviation weather site with official forecast products as well as experimental products.

Customized weather for balloon pilots. METARs, TAFs, winds aloft, sunrise/set for multiple stations compared side by side, all codes translated to English and times converted to local.

Aviation Weather for Flight Preparation with TAF Metar Sigmet Radar and Sat-pictures.

FAA's Direct User Access Terminal service provides free aviation weather and flight planning for certified pilots in the US.

Obtain plain-language weather briefings using exclusive WXpert translation. View up-to-date weather graphics. Helps prepare and file flight plans. Available both on the Web and on mobile PDAs (Palm i705, etc.)

Weather information for flying in Europe, including all airport notams, calculations, country information, airport webcams, FBO database, and all aviation abbreviations.

Archive of current and historical METAR and TAF reports for airports worldwide.