Calc98 5.3 Scientific engineering statistical and financial calculator, with conversions, constants and physical property data, a built-in periodic table of the elements, stopwatch, number base conversions, vectors, matrices and complex numbers.

Uconeer 2.4 Freeware. 397 units in 46 categories. Includes engineering specific categories like enthalpy, heat capacity, heat transfer coefficient, torque and viscosity. Work with feet and inches. Formatting and clipboard features. Excludes archaic units.

Gravitational Lensing 1.00 With this program, one can draw images to see the effect of gravitational lensing. You can easily test the effects of several parameters by changing them and redrawing the image.

GrandTour 4.1 Accurate, flexible wireframe simulator for the Voyager and Giotto space missions, with animation capability. Developed at JPL for science/navigation, and filmed by the BBC/NOVA. Conveniently runs from any Windows/DOS.