I use obsidian but I wish there was an open source notes platform that could do what I want:

1. Excalidraw support ( or similar ) with PDF import and annotation support ( this is achieved by a plugin on obsidian )
2. Vim mode
3. Markdown for everything

I have tried so many notetaking tools and the closest I ever got was using xournalpp for PDF annotation and drawing, then writing plain markdown in helix / neovim, with a live markdown rendering pane on the side. Was just too clunky though.

IMO the signal matrix bridge solves this problem. It does not do video calls to my knowledge, but it does let me have all my signal messages on all my devices, with no limitations.

And it’s not even a compellingly better alternative than the other options. Gitlab, or gitea, or forgejo are all great.