Freeware Calculator

Past is free software for scientific data analysis, with functions for data manipulation, plotting, univariate and multivariate statistics, ecological analysis, time series and spatial analysis, morphometrics and stratigraphy..
Download PAST 4.03 (from Calculators)

5.3 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

GeoGebra, an open-source utility designed explicitly for helping users design diverse mathematical objects used for calculus, algebra and geometry. A review of GeoGebra has also been published.
Download GeoGebra 6.0.883.0 (from Calculators)

50.8 MB | For Windows 7, Windows 8 / Vista / XP | Free

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, sets, lists, vectors, matrices and tensors..
Download Maxima 5.47.0 (from Calculators)

48.7 MB | For Windows 7, Windows 8 / Vista / XP | Free

Scilab was designed to be a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications..
Download Scilab 6.1.1 (from Calculators)

127 MB | For Windows 7, Windows 8 / Vista / XP | Free

SpeedCrunch is a powerful algebraic calculator that you can use to solve even complex functions. A review of SpeedCrunch has also been published.
Download SpeedCrunch 0.12 (from Calculators)

9 MB | For Windows 7, Windows 8 / Vista / XP | Free

GeoGebra Portable is an impressive open-source mathematics application that grants access to an array of calculus, algebra, and geometry tools for students and teachers alike. A review of GeoGebra Portable has also been published.
Download GeoGebra Portable 6.0.883.0 (from Calculators)

57.5 MB | For Windows 7, Windows 8 / Vista / XP | Free

Microsoft Mathematics is a free calculator tool available from Microsoft which goes above and beyond what the typical Windows calculator can do. A review of Microsoft Mathematics has also been published.
Download Microsoft Mathematics 4.0.1108 (from Calculators)

17.6 MB | For Windows 7, Windows 8 / Vista / XP | Free

**** Qalculate **** is a multi-purpose cross-platform desktop calculator..
Download Qalculate 5.5.1 (from Calculators)

76.5 MB | For Windows 7, Windows 8 / Vista / XP | Free

Gnuplot is a portable command-line driven graphing utility that was originally created to allow scientists and students to visualize mathematical functions and data interactively, but has grown to support many non-interactive uses such as web scripting..
Download gnuplot 6.0.2 (from Calculators)

25.3 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

Alternative Windows Mini Calculator with 2 views, general functions, Dec-Hex-Oct-Bin integers..
Download Mini Calculator 1.4.9.2 (from Calculators)

0.43 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

Easy Credit Card Verifier instantly checks credit card numbers for validity using LUHN10 algorithm..
Download Easy Credit Card Verifier 1.13 (from Calculators)

0.37 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

When diving into complex mathematical calculations or programming, Texas Instruments calculators often lead the pack. A review of Wabbitemu has also been published.
Download Wabbitemu 1.9.5.22 (from Calculators)

4.6 MB | For Windows 7, Windows 8 / Vista / XP | Free

Free42 is a re-implementation of the HP-42S Scientific Programmable Calculator and HP-82240 Printer..
Download Free42 v3.0.16 (from Calculators)

4.2 MB | For Windows 7, Windows 8 / Vista / XP | Free

If you're on the hunt for a software solution that can take care of complex mathematical operations with ease, then look no further than the Advanced Trigonometry Calculator. A review of Advanced Trigonometry Calculator has also been published.
Download Advanced Trigonometry Calculator 2.1.5 (from Calculators)

1.9 MB | For Windows 7, Windows 8 / Vista / XP | Free

Estimator is a free program you can create estimations for constructions, print an estimation and a proposal..
Download Estimator 1.99.26.57 (from Calculators)

7.5 MB | For Windows 7, Windows 8 / Vista / XP | Free