Paper Airplane Sites

• Open Directory-Origami Airplanes : The most comprehensive paper airplane directory edited by the volunteered editor.
• The Ultimate Origami Airplanes(in English & Japanese): There are eleven different origami models.  "How to Fine-tune Your Origami Airplane" provides good advices. 
• BestPaperAirplanes.com: Ten original flying paper airplanes.
• Papierflieger (in German): Folding instructions of 20 paper planes. 'F-15 Eagle' is an interesting model.

Flight-related Sites

• The Life of Birds-The Mastery of Flight :  How do birds manage to stay airborne? BBC Worldwide, YouTube channel by David Attenborough (49min)
  
• Flight-Related Resources on the World Wide Web:Web site hosted by Gander Academy in Canada. Many educational links for elementary school kids. Recommended by the 'Daily Telegraph'(UK) newspaper.
• Airplane Collectible Net Resource: Many interesting links for airplane enthusiasts. The site contains 'How to make Paper Airplane that flies like a real one?' and 'Collect and Make Paper Airplane Models.' Website is hosted by Paul Phua.
• Paper Aircraft Association:The site of Andy Chipling, who works with the Guinness Book of Records to produce the rules for official paper aircraft records. Includes information on paper aircraft history, and duration, distance, wingspan records. AIMS - The association is: Working for the advancement of paper aircraft technology"

Origami Sites

• Origami USA : An educational and cultural arts organization which is dedicated to the sharing of paperfolding.
• British Origami: British Origami club web site.
• Joseph Wu's Origami Site:This is an excellent Origami web site.
• Exploratorium On-line Magazine: Story about Origami, Paper Airplane