File or document viewer, graphing tools, calculators and other useful software for Mathematics.

A modified version of very popular PDF reader with lots of new features.
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A popular PDF file reader.
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View, search, and print PDF files with ease and expertise. Open and read virtually all PDF documents.
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One of the best free open source PDF Creator.
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A very smart and small standalone DJVU file reader.
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A best and recommended viewer to print or read DJVU Files .
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Vector Calculation, Point, Line, Plane, Coordinate System, Matrices, Complex Numbers.
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You can use Calculator Plus to perform any of the standard operations for which you would normally use a handheld calculator. Calculator Plus performs basic arithmetic, such as addition and subtraction, as well as functions found on a scientific calculator, such as logarithms and factorials.
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Unlike traditional desktop calculator, SpeedCrunch is easier to use. You just type the expression that you want to calculate and press Enter. You can see clearly what you typed along with the result in the scrollable display. That is faster and more convenient, isn't it?
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