DTC Duat Service - Free FAA certified DUAT service, weather, and flight planning. Text weather briefings; weather maps, including state NEXRAD flight planning and filing. All services are free.  Affiliate Member.

Meteorlogix - A comprehensive satellite delivered weather service specially designed for airports, pilots, & FBO.  Affiliate Member.

CSC DUATS - Free FAA certified DUAT service, weather, and flight planning. Text weather briefings; weather maps, including state NEXRAD flight planning and filing. All services are free.

National Weather Service - Aviation Weather

Nav Canada - The NAV CANADA Aviation Weather Web Site (AWWS) provides flight-planning capability via the Internet for your convenience. This capability includes aviation weather, NOTAM and electronic flight plan filing applicable to flight operations within Canadian Domestic Airspace.