Festo SmartInversion and Air Ray,Air Penguin

Festo SmartInversion -- flying geometrical band with inversion drive

SmartInversion is a helium-filled flying object that moves through the air by turning inside-out. This constant, rhythmically pulsating movement is known as inversion and gives the flight model its name. Made possible by its lightweight design and the lift provided by helium, the Air_ray "swims" in a sea of air like a manta ray in water.
http://www.festo.com/cms/en_corp/9789.htm  - Autonomous flying in a sea of air Autonomous flying through a defined air space monitored by ultrasound transmission stations. Agile and easily manoeuvrable with a 3D structure which utilises the Fin Ray Effect® at the front and back.