FNA
FNA FNA is a multi-function scientific calculator and unit conversion utility. Four modes of operation (statistics, trigonometry, base-n, and unit conversion). Convert units of Acceleration, Angle, Area, Density, Energy, Force, Fuel Efficiency, Length, Mass/Weight, Power, Pressure, Speed,... Perform complex mathematical calculations using such operations as factorial, gamma, combinations, permutations, logarithms, standard and hyperbolic trigonometric functions, and base-n conversions and logical operations.
http://www.rjsoftware.com/files/FNA_131.zip - 319Kb - Download - Screenshot

SplineCalc
SplineCalc is multipurpose scientific calculator for implementation of various mathematical operations with maps (grids), data tables, lines, polygons and numbers. You can use arithmetical and logical operations with any above data types. It is possible to specify some surface with usage... Besides arithmetical and logical operations it is possible to carry out union, inversion and subtraction with multiply connected polygons. ... Sixth samples are included which show ample opportunities and high precision of calculations.
http://www.geospline.com/archive/spcalc432.zip - 546Kb - Download - Screenshot

Matrix ActiveX Component
The Matrix ActiveX Component is a useful tool that can simplify the use of matrix operations for mathematical computations in application development. It provides for matrix operations such as addition, subtraction, multiplication, inversion, transpose, and computation of determinant, LU and... Advanced II edition now supports operations with complex matrices. ... You may be developing a statistical package, or you might want fast 3D graphics transformations, or you may need to solve simultaneous equations, multivariate linear regressions, or to solve EigenValues and EigenVectors problems,...
http://www.bluebit.gr/matrix/maxc31.zip - 468Kb - Download - Screenshot

Active Calculator Component
Support all common mathematical expressions Support arithmetic, logic and bitwise operations Report syntax error in expressions Support common control flow in programming languages like for, while, if etc.
http://www.qwerks.com/download/7942/XCalcSetup.exe - 2Mb - Download - Screenshot

AbleCalc
AbleCalc is a great tool for anyone needing mathematical help with calculations. The program shows big numbers in natural style, not as "12345E+1234" and also displays a symbol representing your current operation at the left of the entry field. This is a wonderful simple calculator with great...
http://www.mathterra.com/files/ablecalc.zip - 673Kb - Download - Screenshot

FAS Calculator
FAS Calculator is an expression calculator which allows you to directly enter an expression to be evaluated. More than one hundred functions are supported, including algebraic, transcendental, trigonometric, hyperbolic, engineering functions. FAS Calculator includes functions that allow you to... The calculator's intuitive, easy-to-use interface as well as its broad support of common mathematical, engineering functions makes it a must-have for both students and professionals. ... The calculator allows you to perform some operations with complex values.
http://www.freeartsoft.com/fascalcsetup.exe - 841Kb - Download - Screenshot

HIME: Huge Integer Math and Encryption
HIME stands for Huge Integer Math and Encryption library. It is a collection of functions for Windows programmers that allows to implement RSA public key encryption, AES (Rijndael) and ArcFour (RC4) secret key encryption and digital signatures using the SHA-1, SHA-256 or MD5 Secure Hash... Blum-Blum-Shub and RSA), Diffie-Hellman key exchange algorithm and huge integer number mathematical operations. ... These mathematical functions can serve as building blocks for implementing other public key encryption schemes.
http://users.skynet.be/bs248355/devotechs/downloads/HIME.zip - 747Kb - Download - Screenshot

Mathematics Worksheet Factory
Create professional-quality mathematics worksheets to provide students in grades K to 10 with the skills development and practice they need as part of a complete numeracy program. Over 60 mathematics worksheet activities can be produced to advance and reinforce skills in number operations,... The worksheets that you create with Mathematics Worksheet Factory are not pre-designed but are randomly generated based on a complex set of algorithms corresponding to the specific mathematical structure of each type of worksheet.
http://www.schoolhousetech.com/pgm/M92572/MathematicsWFTrialSetup.exe - 7Mb - Download - Screenshot

The Calculator
The Calculator is small and handy. It supports compound expressions, bit operations, unlimited number of user variables and constants, and works with various types of notation. Special features: * User Variables. In computations, you can save your intermediate results in variables for further use. ... Some frequently used values, such as physical and mathematical constants, may be written in a special file, and then used in your computations by name, just like variables. ... * User Constants. ... (By default, The Calculator works with radians) Type cos(20g) and get the result.
http://www.delta-z.com/files/thecalc.zip - 313Kb - Download - Screenshot

WinBatch
WinBatch is a scripting language for Windows 2003, XP, 2000, NT. Macros can be run from icons, hotkeys, or other software macros to automate all aspects of PC operation. WinBatch+Compiler, the corporate development package, makes executable runtimes for unlimited distribution. ... Featured in WinBatch are a simple BASIC-like syntax, network management, string-handling, keystroke recording, and various functions for file management, directory management, disk drive management, Window management, mathematical computation, DDE, OLE, messaging, serial communications, internet communications,...
http://files.winbatch.com/wwwftp/wb01/wbcurver.zip - 4Mb - Download - Screenshot