Free Scientific Educational and Engineering Software

Yorick - Yorick is an interpreted programming language for scientific simulations or calculations, postprocessing or steering large simulation codes, interactive scientific graphics, and reading, writing, or translating large files of numbers. Yorick includes an interactive graphics package, and a binary file package capable of translating to and from the raw numeric formats of all modern computers. Yorick is written in ANSI C and runs on most operating systems (*nix systems, Windows, MacOS).
Download           OS: Windows | MacOS | Unix | Linux

K3DSurf - K3DSurf is a program to visualize and manipulate Mathematical models in three, four, five and six dimensions. Theses Mathematical Objects, described with implicit/explicit parametric equations, can be either surfaces or curves. Studying mathematical surfaces with K3DSurf include doing: Interactive visualization with mouse events (Right: Rotate, Middle: translate and left: Scale). Real time animation (rotation) and morph (by the introduction of t_time variable). Animation and morph can also be monitored by controls that affect the CPU usage and t_time step. Creat screenshots by copying the draw window or by using the best ray tracer on the net: Povray. Creat movie scene is also supported Generat Mesh files that describe the shape of the mathematical model. Supported formats are: Povscript : Povray is the best ray tracer available on the net...and it's free. VRML2: to use with the majority of current browsers via an appropriate plug-in. OBJ: a well-known file format supported by the majority of 3D applications (Blender, MAYA and Moray...).
Download           OS: Windows | MacOS | Linux          

Scientific Forecasting Software - This free online software offers time series analysis for the purpose of: sales forecasting (of monthly and quarterly sales data), business analysis (marketing, operations research, ...), financial modeling (estimation of risk probability distributions), economic forecasting (business cycles, macro economic time series), analysis of biological, physical, chemical, and engineering time series.

Gravitorium - let you play with "What If" ideas about gravity and gravitational systems. It's not intended as a serious solar system simulator, though its accuracy is pretty good over modest periods of time (a hundred years or so). But it is quite good enough to get a good general impression of the likely course of events in a particular planetary system.
Download           OS: Windows 95/98            Size: 5Mb

Aepryus Force - The program allows for the definition of systems of particles in 2D which it will than animate based on the laws of classical physics using Runge-Kutta. It also plots field lines and potentials.
Download           OS: DOS/Windows            Size: 5Mb

Online calculators for engineers - free online calculators and other resources for engineers and technicians from Gregory Monachos: units calculator, water properties resources, Interactive Elements table, a kvar online calculator, a voltage drop calculator, a Darcy Weisbach friction calculator , and much more.

Educational Software Sections: Educational Software for Kids, Mathematics Software, Science Software