archelios

spherical helicopter (lands by rolling, 40mph, hover): http://www.popsci.com/technology/article/2011-10/video-japans-new-ball-shaped-drone-wows-crowds-tokyo

Gamera human powered quadracopter (50 seconds hover):
http://www.huffingtonpost.com/2012/06/25/gamera-ii-human-powered-helicopter-record-video_n_1625732.html

Samarai monocopter (based on maple seed samara whirlygig): http://www.geekologie.com/2009/09/crazy-lockheed-martins-samurai.php

"Steamboat willy"  human powered hovercraft: http://steamboatwilly.org/

coaxials, tilts, contra-rotors
http://en.wikipedia.org/wiki/Tandem_rotor
http://en.wikipedia.org/wiki/Tiltrotor
http://en.wikipedia.org/wiki/Intermeshing_rotors