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Useful Drone links
Below sites have really good info on DIY drones --
http://wiki.paparazziuav.org/wiki/Main_Page -- Open source -- Hardware n software for DRONES
http://1bitsquared.com/ -- really tiny miny hardware for drones
http://www.airspayce.com/mikem/arduino/ --- Useful libraries for RF on Arduino
http://story.glass/uav -- Good explanation of buiding your own drones -- more material on https://news.ycombinator.com/item?id=8566641
http://www.exmaps.com/ -- Share your drone data
http://ardupilot.com/ -- Auto pilot stuff
http://diydrones.com/ -- good drones material for starters