(YouTube Link)

Swisscopter's Dragonfly is a small helicopter that has rocket engines on the ends of its rotors blades to propel them:

The copter makes use of tiny hydrogen-peroxide-powered rocket motors on the tips of the blades, which replaces the traditional engine-powered rotor. Large fuel tanks surrounding the pilot allow the Dragonfly to travel at up to 40 mph for 50 minutes.

via Popular Science | Company Website