Screenshots:

Click to enlarge		TkGate main window in edit mode with the default tutorial circuit that is loaded on start up.
Click to enlarge		TkGate main window in simulation mode while simulating a microprocessor with probes set on several of the signals.
Click to enlarge		Logic analyzer window showing output from the microprocessor simulation.
Click to enlarge		Tty window and the portion of the main window including the controller for the tty.