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 Download
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 Download
College Scientific Calculator 36 for scientists, engineers, teachers, and students. Calculates mathematical formulas of any length and complexity.
Price: $14, Rating: 0, Downloads: 97 Download