Gossamer Albatross Photo Collection
- Gallery archive of the NASA Dryden Flight Research Center.
- http://www.dfrc.nasa.gov/gallery/photo/Albatross/

Human Powered Ornithopter
- Human flight through flapping. Features overview of projects including Karura, photo galleries, and contacts.
- http://web.kyoto-inet.or.jp/people/kazuho/index-e.htm

Raven Project
- Includes details, history and FAQ regarding this human powered aircraft (HPA) that has a wing span of 115 ft, a length of 30 ft, a height of 11 ft, and a weight of 90 lb.
- http://ravenproject.org/

Velair
- Features information, specifications, photos and history of the first aircraft to fly from Munich airport (MUC) runway in the summer of 1990.
- http://www.skytec-engineering.de/hpa.htm