AlexCalc is a scientific calculator with some neat features (note: also available as a web app at https://alexbarry.github.io/AlexCalc/ ):
* nicely formatted (LaTeX) equation display. This avoids the need to count brackets to make sure the equation was entered correctly. Also includes LaTeX code generation.
* complex number support, in rectangular or polar form (e.g. `3 + 4i` or `1 angle 90`)
* variable storage (e.g. `123 -> x` then `3*x^2 - 4*x + 5 -> y`)
* units in equations, and conversion (e