Atanua is a powerful, real-time circuit simulator and visual editor. It is designed to be easy to use and understand, while still providing powerful and advanced features. With Atanua, users can build and simulate digital logic circuits, see the results in real-time, and quickly check the behavior of their design. Atanua also provides a vast library of components and a wide range of customization options. It is a great tool for students, educators, hobbyists, and professionals who need to quickly and accurately design, test, and debug digital circuits. With Atanua, users can quickly build and simulate their circuits, debug any issues, and even export the designs to other platforms, such as hardware circuit boards.
Discontinued http://www.cburch.com/logisim/retire-note.html