AutoCAD - 216 percent

AutoCAD is the premier design software for engineering applications and has seen strong growth as the number and complexity of IoT devices continues to increase. Smart, connected products often require a whole new set of design principles, such as designs that achieve hardware standardization or enable personalization. "Product development processes will need to accommodate late-stage design changes quickly and efficiently, making this an ideal use-case for freelance talent that's skilled in AutoCAD," Johnson says.