logisim-evolution

Logisim-evolution is educational software for designing and simulating digital logic circuits. Logisim-evolution is free, open-source, and cross-platform.

Project highlights:

• easy to use circuit designer,
• logic circuit simulations,
• chronogram (to see the evolution of signals in your circuit),
• electronic board integration (schematics can be simulated on real hardware),
• VHDL components (components behavior can be specified in VHDL!),
• TCL/TK console (interfaces between the circuit and the user),
• huge library of components (LEDs, TTLs, switches, SoCs),
• supports multiple languages,
• and more!