LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
XCircuit - XCircuit: Home Page
BSch3V - Schematic capture program for Windows Vista/7/8/10
Splan - sPlan is a software to design your schematic circuit diagrams.
PADS PCB Design - Best-in-class PCB design tools at unbeatable prices