Drones — specifically quadcopters — are a versatile bunch. They’ve been used to inspect gas terminals, oil rigs, and turbines for wear and tear by startups like Sterblue, Clobotics, General Electric spinoff Avitas Systems, and Cyberhawk. French firefighters tapped them to survey Notre Dame during the recent blaze. And San Francisco-based Matternet is collaborating with UPS to launch an aerial medical specimen delivery service in Raleigh, North Carolina.