CalcIT's basic layout is easy
to read with large, color-coordinated buttons, and mode
indicators for degrees/radians/gradients and
decimal/hex/binary modes. The usual scientific and memory
buttons are present, and multiple levels of nested
parentheses are supported. A variety of quick numeric
conversions between the English and metric systems are
available.
Fractions mode lets you work
directly in fractions rather than decimal. This is handy
for people who, like me, often work with recipes or
woodworking designs.

The display is customizable in
three ways. First, many of the keys have keyboard
shortcuts, which can be displayed above the keys as shown
below. The remaining keys can be activated with their
keyboard counterparts, so you can use CalcIT without the
mouse.

You can also show the secondary
functions for the green function buttons.

Both keyboard shortcuts and
secondary functions can be shown at the same
time.
Finally, if you don't like the
color scheme, you can choose a different background. The
highlight color for the keyboard shortcuts and secondary
functions will automatically be calculated for contrast.
For example, if you'd prefer purple, your view might look
like this:

Please feel free to
let
me know if there are
any other features you'd like to see
added.
Download
(MacOS 8/9/Classic, 852K)
Download
(OS X/Carbon, 1000K)