I built a compact physical keyboard for people who type mathematical and scientific symbols often.
The idea came from a small but repeated frustration: writing math by hand is fast, but typing math on a computer usually means stopping to find the right symbol.
If I need a scientific symbol while writing notes, slides, lab reports, or technical explanations, I do not always want to open a symbol menu, copy from an old document, or switch into a full equation editor.
So I started working on the Nitrax Mathematical Keyboard.
It is a physical math keyboard, not a virtual keyboard, calculator, or generic keypad. The symbols are printed directly on the keys, with blue and gray symbol layers accessed through key combinations.
On Windows, the companion app uses AutoHotkey to send Unicode characters into the active application when Math Mode is enabled.
The goal is not to replace LaTeX or professional equation typesetting. It is for everyday math typing in normal writing workflows, where you just need the symbol now and want to keep writing.
Project link: https://mathematicalkeyboard.com/
I would be interested to hear how other developers would approach the layout problem: would you organize math symbols by category, frequency of use, or memory cues?