Gerber to PDF converter
A set of freeware applications for viewing/processing P-CAD files.
GHDL - a VHDL simulator
Convert DXF drawings of circuit boards to gEDA-PCB files.
Library of Approximate Adders
An HDL alternative to PCB graphical schematic capture tools.
Create fast bare-metal FPGA designs without Verilog or VHDL
Electric power system transient simulator