A suite of RPN calculators and a class library for Object Pascal
End User Tools for Windows.
C++ complex calculator with arrays, matrices, eigenvectors, functions
Complex quaternion calculator with Lorentz boosts and rotations
A calculator like programming language
A simple molecular weight calculator
Third-party TI-84 Plus CE / TI-83 Premium CE emulator
Calculates the transportation cost seasonality indexes
The functional model of the old calculator series Wang 700 and 15VSM
Every PC user should know how much his Computer is polluting the World
Throw CPU and memory at problems you fail to solve mathematically! :)