PADS PCB Design is described as 'The industry-leading, high-productivity, PCB-centric design solution for independent engineers' and is an app in the Education & Reference category. There are more than 10 alternatives to PADS PCB Design for Windows, Linux and Mac. The best alternative is KiCad, which is both free and Open Source. Other great apps like PADS PCB Design are Fritzing (Paid, Open Source), LibrePCB (Free, Open Source), Altium Designer (Paid) and Proteus PCB design (Paid).
PCBWeb is a 100% free Windows desktop CAD application for designing and manufacturing electronics hardware. Features include schematic capture, PCB Layout with gerber output, and Bill of Materials manager.