5spice
Spice based electronic circuit simulation and circuit analysis software. 5Spice has the analysis capabilities needed by experienced circuit designers while remaining easy to use.
gEDA Project
The gEDA project has produced and continues working on a full GPL'd suite and toolkit of Electronic Design Automation tools. T ...
Circuit Tree
Circuit Tree is a powerful, hardware design engine.
FEATURES
- Fully-automated electronic design capabilities
- Design a custom, ...
ModelSim
ModelSim-Altera Software
CircuitLab
Sketch, simulate, and share your circuits, entirely in your browser -- no install required. Easy schematic capture and powerfu ...