It depends on what you want to do. Draftsight is one... Anything in the manufacturing world is gaining in speed. With 3D printers everywhere, it just makes sense. HArdware is free... makerbot supplies a way to make everything.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.