DesignSpark PCB

DesignSpark PCB lets you draw a schematic, transfer it to a board, route it and produce manufacturing files. The free Explorer plan has no limit on layer count, schematic sheets or number of connections, and includes a design rule checker, Gerber and Excellon outputs, export to mechanical tools and SPICE, and GPU-accelerated graphics. It suits engineers and students designing boards for controllers, sensors and small power circuits. Limitations: Windows only, a DesignSpark account is required, and features such as differential pair routing, blind and buried vias and hierarchical schematics are reserved for the paid plans.