NilnocCalc

This fully functioning 64 bit Calculator features 10 registers to save values. Hex, Oct, Bin displays. Full set of Trig functions.
Users can customize:
The colors of buttons and effects ( border and gradient )
The number of digits displayed to the right of the decimal.
When Scientific Notation is used for display.

Also contains many standard unit conversion constants.

Also includes a Binary Float display .

Combinations and Permutation calculations built in.