http://nodecopter.com/
http://ardrone2.parrot.com/usa/
http://www.amazon.com/Parrot-AR-Drone-Quadricopter-Controlled-Android/dp/B007HZLLOK
http://nodecopter.com/modules
https://github.com/substack/virus-copter
http://dronegames.co/
http://summerofdrones.com/

nodecopter video
http://youtube.com/watch?v=t13jGeBAWrA

team presentations from nodecopter 2012
http://www.youtube.com/watch?v=eLqX7RMpTS8
http://www.youtube.com/watch?v=gucpgJEJ5b4

you can just telnet in apparently:
http://www.youtube.com/watch?v=jl5v3bsMH_E

browser simulator
demo: http://shama.github.com/voxel-drone
code: http://github.com/shama/voxel-drone

Here's a paper that describes a battery swapping mechansim, based on
electromagnets:
http://diyhpl.us/~bryan/papers2/paperbot/56dc111cbf4502d5666c7f3dab6647fc.pdf

"The octagonal stage can store and charge up to eight batteries in
fiberglass compartments allowing one helicopter to fly indefinitely."

Here's one that describes electrical contacts (no battery switching):
https://fling.seas.upenn.edu/~yashm/wiki/pub/files/YashThesis.pdf
video: http://www.youtube.com/watch?v=RoAp0pzqLY4

More about using polysplines for trajectory planning:
http://diyhpl.us/~bryan/papers2/paperbot/Trajectory%20generation%20and%20control%20for%20precise%20aggressive%20maneuvers%20with%20quadrotors.pdf
video: http://www.youtube.com/watch?v=ul7YboQA5OY
https://github.com/nmichael/ipc-bridge

alternative battery switching mechanisms:
http://xs3d.kaist.ac.kr/paperdata/2011/2011-JIRS-Morrison-UAV%20bat%20replace-Online%20First.pdf

some ROS things
http://ros.org/wiki/tum_ardrone




http://www.libcrack.so/2012/10/13/hacking-the-ar-drone-parrot/