EE Times has posted a list of the Top Free DIY Tools Every EE Needs. The tools include:
- SmartSim
- CoolSpice
- Electric VLSI Design System
- Qucs (Quite universal circuit simulator)
- Logisim logic simulator
- Cedar Logic Simulator
- Calculatoredge
- Circuit Virtual Laboratory
- TinyCAD
- DesignSpark PCB
- gplEDA
- DraftSight 2D CAD software
- eDrawing
- Mach3
- CustomPartNet