Sage is a free open-source mathematics software system licensed under the GPL. It combines the power of many existing open-source packages into a common Python-based interface. Mission: Creating a viable free open source alternative to Magma, Maple

Price: $0, Rating: 9, Downloads: 211

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RionaCalc is a small and powerful calculator can convert units of measurement,
calculate mathematical expressions, support complex numbers, common fractions, date
and time, draw 2D, 3D graphics and polar plot, has built-in scripting language.

Price: $0, Rating: 10, Downloads: 188

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College Scientific Calculator 36 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity.

Price: $14, Rating: 0, Downloads: 97

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