A circuit simulator with graphical user interface (GUI)
Qucs is a circuit simulator with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported.
ATEProg is project to write software which can program AT89xx and AT89x051 microcontroler chips (and others) in ATE2000 programer (and others).
Extensible and easy to use logic circuit simulator.
Willem Programmer with GUI.