Kalcu

It supports algebraic, logarithmic, exponential, tringonometric and inverse logic functions.
It has 26 memories for variables.
Save the last 30 formulas entered.
Combination, permutation, factorial, roots, real powers, fractions, degrees, parentheses and separation of terms.
Intuitive and elegant interface.
Contextual Help
Available languages: English, Spanish, Portuguese, French, Italian.
It is identical to an electronic scientific calculator.