Dazycalc is a futuristic looking calculator, at first sight.
It has a lot of modules which I spent an hour trying out.
Most of the modules are working well, and are valuable for their
purpose.
A few crashed the program, some behaved in an irritating way.
Among the modules is a very interesting editor, for rtf and txt.
The periodic table works very well.
Many technical and electronic math help programs.
Graphing calculators, 2D and 3D.
"Expression solver with programable scripting, hex-dec-bin ops, 2D,3D
equation graphing, loan calc, electronic formula functions, statistics
with regression analysis, geometry calc, advanced text editor, image
editor/viewer, complex math, matrix math, linear equation solver, unit
conversion, chartmaker/ graph plotter, periodic table, equation
illustrator, hex viewer, schematic editor."
It is freeware according to its own help text.
Many other technical freeware programs suitable for electronics and
science in general, math equations and geometry formulas and
calculators, at:
http://www.infinitespectra.com/freeware/index.html
The scientific calculator MA 2003 is also a very capable program.
It has the irritating feature that it is stuck to the upper left corner
on screen, in my win98se system.
As many of these programs they have some silly mistake in an otherwise
very good program.
The biggest mistake in Dazycalc is the visual design.
I wish the modules were available as separate programs.
I trid to move the Dazycalc folder and run it from somewhere else, it
works without a problem. MA2003 runs from any folder. So these programs
are movable once unpacked/installed.