Atanua

Atanua is an application for creating logic problems by assembling different types of electronic circuits like logic gates, timers, switches, and other blocks and tools.

The application has a pretty simple interface which relies exclusively on drag-and-drop. With just a few simple mouse gestures, you can create circuits from the elements you have grouped in the sidebar.

Atanua is an especially great application for computer and electronics students. With it, you can make complex circuits in just a few minutes. Even better is the fact that you don't have to install the application to use it.