Fed Communications Commission FCC License application and information
 Sailmail.com The SailMail Association is a non-profit association of yacht owners that operates and maintains a network of private coast stations in the Maritime Mobile Radio Service.  The Association provides radio printer (e.g. Internet email) communications for its members on a cooperative basis, in order to meet the private business and operational needs of the members' yachts. The SailMail Association provides worldwide coverage.
 Winlink 2000 Their Mission is to provide a full-featured digital email transfer, position reporting, weather, and bulletin service to the amateur radio community worldwide, especially where Internet access is not available. 
 Voyagers Service Inc Voyagers Mail Forwarding Service - a snail mail forwarding service.  In addition they also offer many related services such as: marine single side band radio &
satellite communications, voice mail, 24 hour fax, and bill paying,