Electronic Design Automation

Electronic Design Automation is commonly used to describe software for 3 major stops working with electronics hardware design and analysis:

The following options are a sample of Free Libre EDA packages:

• Schematic Capture
  1. gEDA
  2. kiCAD-EDA
• Simulation and Analysis
  1. SPICE
  2. qucs
• Layout
  1. pcb-rnd
  2. pcbnew(part of KiCAD)

Additional helper programs exist -- for digital design, simulation of specialized purpose, and more.

...add http://fritzing.org ?