Andrzej Wrotniak
Kalkulator v.2 41
The Mother of all Calculators, a Swiss Army knife for scientists and engineers. Perhaps the most capable scientific/engineering calculator for Windows. On one hand, this is a calculator: evaluates expressions with more than 100 functions
Midget v.1 36
A tiny, but very capable numerical calculator for Windows. It differs from others in the way you calculate your expressions: enter the whole expression at a time, like "2+3.9/7.1-3 sqr 5", and only then hit Enter to compute the value.
My Sudoku v.1 6
The computer program My SUDOKU, designed in SudokuPolska.com, enables building exciting sudoku puzzles of several difficulty levels. You can solve each puzzle yourself, using tips.
Statmaster v.2.30
Many scientific and engineering programs generate numeric output which needs to be presented graphically.