Fltplan.com

FltPlan.com is a website that serves the general and corporate aviation community. Founded in 1999, it originally concentrated on flight planning. Its services now include flight tracking, e-APIS submissions, Safety Management Systems(SMS), GPS RAIM predictions, and an FAA-approved weather service.
Overview.
The website provides information and tools used by more than 85,000 active pilots to create, file and manage flights within the U.S., the Bahamas, Bermuda, Puerto Rico, Canadian, and Mexican airports. The site assists in the creation of professional IFR flight plans and navigational logs. It provides IFR routing, winds aloft, aircraft performance, an airport database, frequencies, FBO information and recommended alternates.
It was voted Best in Online Weather in the 2008 and 2009 Professional Pilot PRASE surveys.
E-APIS.
In April 2009, the site announced its e-APIS (electronic advance passenger information service) manifest submission service. FltPlan.com was the first service to receive certification from the US Department of Homeland Security and Customs & Border Protection. Benefits of this service include integrating with flight plans, storage of passenger, aircraft, aircraft owner and crew information for e-APIS submissions. The service can be accessed from any web browser.
Callsign.
The site offers customers the ability to block tracking of their aircraft and flights by giving them flight numbers like an airline.