Recommendation of lightweight drawing application for math lectures?
I have used obsidian and excallidraw for my note taking, especially excallidraw for math where I draw with my tablet. But since I started using emacs for programing I would like to move to org roam for school notes. However, I have not found a good alternative program for obsidians excallidraw plugin (I find gimp a bit to big for my purposes).
I use Rnote to write freely on a big whiteboard and Xournal++ for taking notes over PDFs of lectures.
Rnote has a much more modern and user-friendly interface while Xournal++ has more features and has been around for longer. I use both where I feel each excels.
Gilles Castel (RIP) published a couple articles on taking math notes with Vim + LaTeX which I found eye-opening. In another article he posted about how he integrates Inkscape into the process. If you haven't read the articles, they may be helpful for what you are doing.
This app can be configured to produce plain SVGs which can theoretically be embedded into org-mode documents and can easily be stored in git. I have always used it stand-alone though.
It's proprietary and the UI looks like an Android app from 10 years ago but it's the best hand-drawing experience I've found on Linux.