Aviation

Ace's Pilot Shop Weather Data - Aviation weather and flight planning, including forecasts, observations, weather maps, DUATS briefings, icing, and turbulence.
www.acespilotshop.com/wx2.htm

Airwx Mobile - Get METARs, TAFs, PIREPs, and weather charts on your mobile phone (and iPhone).
m.airwx.com

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

Aviation Weather Center - The National Weather Service's aviation weather site with official forecast products as well as experimental products.
aviationweather.noaa.gov/

BalloonCast - 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.
www.blastvalve.com/weather/

Base Ops - Aviation Weather for Flight Preparation with TAF Metar Sigmet Radar and Sat-pictures.
www.baseops.de/

Data Transformation Corp DUAT - FAA's Direct User Access Terminal service provides free aviation weather and flight planning for certified pilots in the US.
www.duat.com

Enflight - 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.)
www.enflight.com/

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

Meteo Mobile - Metar, Taf, satellite images, airport maps and nearby POI's delivered via mobile phone.
www.aviador.es/

Northwest Airlines Meteorology - Providing weather forecasting products for the aviation industry, including specialized turbulence and thunderstorm forecasts.
www.nwa.com/weather

Pilot Weather Briefing - Free weather information for pilots, including surface conditions, upper level winds, turbulence, icing, thunderstorms, TAFs and Metars, radar and satellite images.
www.pilotweatherbriefing.com

Pilot's Guide to Aviation Weather Services - An online brochure to help pilots use the "National Aviation Weather System."
www.nws.noaa.gov/om/brochures/pilot.htm

SA Weather Service - Aviation - Provides weather services for the aviation industry in Southern Africa. Includes metars, sigmet charts and forecasts.
aviation.weathersa.co.za

Turbulence Forecast - Turbulence forecast maps for around the world.
www.turbulenceforecast.com

Upper Midwest Aviation Weather - Central reference for aviation weather resources, focusing on current and forecast conditions in the upper midwest region of the US, including Minnesota, Wisconsin, South Dakota, North Dakota, and Iowa.
cloud7.org/um_weather/

Winds and Temperatures Aloft - By selecting one of over 160 continental cities in the U.S.A. or one of 30 cities in Alaska, you can obtain wind direction, speed, and temperature forecasts.
www.usairnet.com/cgi-bin/Winds/Aloft.cgi

WSI - Provides pre-flight and in-flight weather information. Aviation weather also available online through WSI Pilotbrief.
www.wsi.com/solutions/aviation/

WXSYS On Demand - Aviation weather for mobile devices including BlackBerry, iPhone, and Windows Mobile.
www.wxsys.com