The Airship Association - The Airship Association was first registered in England on 28th October 1971 as a Company Limited by Guarantee. There are currently around 700 members world-wide. Its goals are to promote the science, practice and consideration of all matters relating to airships, to circulate information on all matters affecting airships,to publish books and papers connected with airships, and to promote research and experimental work on airships.
Bill Ludwig's Site on RC Model Aviation - A site devoted to Model Aviation by Bill Ludwig who has been actively involved in this hobby for over 30 years and loves every minute of it. It talks about RC Airplanes, Helicopters, Free Flight or Control Line.
Model Airplanes.org - Everything you will ever need to get off the ground! This is a great online resource for buying, building, and fixing model airplanes. Whether you are just a beginner, a novice, or even an expert, they have all the information you are looking for.
DronesDEN - Drones for sale in all shapes and sizes and an interesting blog around the topic.