KAlgebra

Open Source Calculator

KAlgebra is a calculator with symbolic and analysis features that lets you plot 2D and 3D functions as well as to easily calculate mathematical expressions. KAlgebra is a MathML-based graphic calculator, thought to bring to the user its power by solving expressions written in MathML or calculating converted common equations to MathML.

SAGE

Open Source Mathematics Software

SAGE can be used for studying a wide variety of mathematics, including algebra, calculus, number theory, graph theory and more. It is used as an open source alternative to many commercial mathematics programs, including Magma, Maple, Mathematica and MATLAB.

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World Wind

World Wind allows any user to zoom from satellite altitude into any place on Earth, leveraging high resolution LandSat imagery and SRTM elevation data to experience Earth in visually rich 3D, just as if they were really there. Particular focus was put into the ease of usability so people of all ages can enjoy World Wind.

Marble

Open Source Geography Tool

Marble is a virtual globe that allows the user to choose among the Earth, the Moon, Venus, Mars and other planets. It is free software under the terms of the GNU LGPL, developed by KDE for use on personal computers and smart phones running a Qt4-compatible operating system. Marble is intended to be very flexible; beyond its cross-platform design, the core components can easily be integrated into other programs.