B-Itineris is a database program to keep track of train journeys on the Belgian NMBS/SNCB network. It allows to save detailed information about rolling stock, trains, lines, stops, journeys, etc. and generates comprehensive statistics.
NecJGui is an antennas design tool, interface for Numerical Electromagnetic Code. It allows easily making NEC input files, and viewing them in 3D. It also contains a version of the simulator, so it's complete IDE for full-wave EM simulation.