JumboCAD EDA
JumboCAD EDA apps is A Schematic and PCB layout software let you create your circuit diagram, simulate your circuit and creat your PCB layout
Platform: Windows
Gears simulator
Gears simulator apps is Design and simulate gears (spur and helical, external and internal meshes, trains), friction wheels, belt and chain drives
Platform: Windows
KiCad
KiCad apps is Create electronic schematic diagrams and printed circuit board artwork
Platform: Windows