LogicSim 3.0b - LogicSim is an application that simulates digital circuits. LogicSim has an easy-to-use graphical interface similar to standard drawing programs such as MacDraw. Circuits are built up from standard components (gates, flip-flops, LEDs, switches, etc.) and can include more complicated modules created by compiling a previous circuit. LogicSim also has a "Signals window" providing an oscilloscope display of the signals at nodes in the circuit. LogicSim is a discrete-time event-simulator.