[NIckGeek]

I made one called MicroPad a few years ago (https://getmicropad.com) and just launched v4 a few weeks ago.

It's pretty full of features and each note is an infinite whiteboard/canvas where you can embed elements anywhere (for example I go horizontally for tangents)

[Royi]

I can see that display math is working with $$LaTexCode$$. But in lie math: $LaTeXCode$ doesn't.

[NIckGeek]

LaTeX inline maths is done inside ;;LaTeXCode;; or ''AsciiMathsCode''

More info on MicroPad Markdown is in the formatting guide in the help notebook.