KiCad EDA is a free, open-source schematics capture and printed circuit board (PCB) design tool. After many years of development it has become a very capable tool that maybe some day will become the Linux of electronics design CAD tools.
 

Schematic Capture with Eeschema

Get started with KiCad EDA and draw your first schematic. This video will take you all the way, from symbol creation via the annotation tool and the electrical rules check (ERC) to the netlist.
   

PCB Layout with Pcbnew

Learn how to design your first printed circuit board or PCB with KiCad EDA. This video will take you from board setup and routing via the footprint editor and the design rules check (DRC) to the gerber files and Bill of Materials (BoM).