Mathematics
SAGE (Software for Algebra and Geometry Expermentation) (
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SAGE is free open source math software that supports research and teaching in algebra, geometry, number theory, cryptography, numerical computation, and related areas. Includes Maxima, Singular, PARI, Matplotlib and other opensource math packages. You can use internet interface (
sage-notebok) to access all the features (needs Firefox).
Maxima (
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Maxima is a system for the manipulation of symbolic and numerical expressions, including differentiation, integration, Taylor series, Laplace transforms, ordinary differential equations, systems of linear equations, polynomials, and sets, lists, vectors, matrices, and tensors. Maxima yields high precision numeric results by using exact fractions, arbitrary precision integers, and arbitrarily precision floating point numbers. Maxima can plot functions and data in two and three dimensions.
TuxMath (
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Tux, of Math Command ("TuxMath," for short) is an educational arcade game. Based on the classic arcade game "Missile Command," Tux, the Linux mascot, must defend his cities. In this case, though, he must do it by solving math problems.
k3dsurf (
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K3DSurf is a program to visualize and manipulate Mathematical models in three, four, five and six dimensions. K3DSurf supports Parametric equations and Isosurfaces. It makes mathematics fun.
Xaos (
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XaoS is an interactive fractal zoomer. It allows the user to continuously to zoom in or out of a fractal in a fluid, continuous motion. This capability makes XaoS great for exploring fractals, and it’s just plain fun!
Physics – Chemistry
PhET ( Physics Educational Technology) (
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Fun, interactive simulations of physical phenomena.
Molecular Workbench (
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The goal of the NSF-funded Molecular Workbench has been to provide a rich environment that makes the atomic level familiar, predictable, and connected with the macroscopic world, and to understand the effect of such an environment on student learning.
EasyChem (
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EasyChem is a program designed to draw chemical molecules
Astronomy
Stellarium (
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Planetarium shows a realistic 3D sky in your computer. Just like what you see with the naked eye, binoculars or a telescope, it is being used in planetarium projectors.
Celestia (
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You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy. The exponential zoom feature lets you explore space across a huge range of scales, from galaxy clusters down to spacecraft only a few meters across. A 'point-and-goto' interface makes it simple to navigate through the universe to the object you want to visit.
Scientific calculations and data analysis
SciLab (
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Scilab is a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications. A number of toolboxes are available with the system: 2-D and 3-D graphics, animation Linear algebra, sparse matrices Polynomials and rational functions Interpolation, approximation Simulation: ODE solver and DAE solver Scicos: a hybrid dynamic systems modeler and simulator Classic and robust control, LMI optimization Differentiable and non-differentiable optimization Signal processing Metanet: graphs and networks Parallel Scilab Statistics Interface with Computer Algebra: Maple package for Scilab code generation Interface with Fortran, Tcl/Tk, C, C++, Java, LabVIEW And a large number of contributions for various domains.
R (
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R is a language and environment for statistical computing and graphics. Language is similar to proprietary S-plus statistical package. R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, ...) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity.
rkward (
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RKWard is meant to become an easy to use, transparent frontend to the R-language, a very powerful, yet hard-to-get-into scripting-language with a strong focus on statistic functions. It will not only provide a convenient user-interface, however, but also take care of seamless integration with an office-suite. Practical statistics is not just about calculating, after all, but also about documenting and ultimately publishing the results.
ParaView (
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ParaView designed with the need to visualize large data sets in mind. -- The goals of the ParaView project include the following: Develop an open-source, multi-platform visualization application. Support distributed computation models to process large data sets. Create an open, flexible, and intuitive user interface. Develop an extensible architecture based on open standards.
gretl (
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A wide variety of least-squares and maximum-likelihood estimators, including systems estimators Single commands to launch things like augmented Dickey-Fuller test, Chow test for structural stability, Vector Autoregressions, ARMA estimation Output models as LaTeX files, in tabular or equation format Integrated scripting language: enter commands either via the gui or via script Command loop structure for Monte Carlo simulations and iterative estimation procedures
PyMol (
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PyMOL is a molecular graphics system with an embedded Python interpreter designed for real-time visualization and rapid generation of high-quality molecular graphics images and animations. It can also perform many other valuable tasks (such as editing PDB files) to assist you in your research.
Text editing
Lyx (
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LyX is a document processor that encourages an approach to writing based on the structure of your documents, not their appearance.
Design
QGIS (
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Quantum GIS (QGIS) is a user friendly Open Source Geographic Information System (GIS). QGIS lets you browse and create map data on your computer. It supports many common spatial data formats (e.g. ESRI ShapeFile, geotiff)
For Children
GCompris (
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GCompris is an educational software suite comprising of numerous activities for children aged 2 to 10. Some of the activities are game orientated, but nonetheless still educational. Below you can find a list of categories with some of the activities available in that category. (includes more than ffers in excess of 100 activities). computer discovery: keyboard, mouse, different mouse gesture, ... algebra: table memory, enumeration, double entry table, mirror image, ... science: the canal lock, the water cycle, the submarine, electric simulation ... geography: place the country on the map games: chess, memory, connect 4, oware, sudoku ... reading: reading practice other: learn to tell time, puzzle of famous paintings, vector drawing, cartoon making, ...
ChildsPlay (
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Childsplay is a suite of educational games for young children
KDE Edutainment
Variuos
TypeFaster (
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This free typing tutor teaches you how to touch-type. Once you can touch-type you will not need to look at the keyboard to find the letters you want to type.
GNU Solfege (
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Solfege is free music education software. Use it to train your rhythm, interval, scale and chord skills
No installation
e-cell (
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an international research project aiming to model and reconstruct biological phenomena in silico, and developing necessary theoretical supports, technologies and software platforms to allow precise whole cell simulation. E-Cell Project develops general technologies and theoretical supports for computational biology with the grand aim to allow for precise whole cell simulation at the molecular level
CellProfiler (
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cell image analysis software is designed for biologists without training in computer vision or programming to quantitatively measure phenotypes from thousands of images automatically