Logisim is an educational and reference application designed for use in the fields of computer engineering, electrical engineering, and digital logic. The application allows users to create, simulate, and analyze digital logic circuits. It offers a graphical user interface and a wide range of components and tools for designing, simulating and analyzing digital logic circuits. Logisim provides users with a library of components, including basic gates, flip-flops, memory, arithmetic devices, and more. It also has a built-in simulator for testing digital logic circuits, and can generate a truth table for each circuit. Furthermore, Logisim allows users to export their circuits as images, as well as generate and print reports on the components and waveforms of their circuit. In addition, it is compatible with Windows, Mac and Linux operating systems.
It is very easy to use, and there are many examples.