For portability, Obsidian supports CommonMark and GitHub Flavored Markdown (GFM):
For expressiveness, Obsidian also supports:
Obsidian is great if you have large screens and atomic short notes. Panes in Obsidian can be split infinitely and resized, and they make cross-referencing multiple notes a breeze.
Panes can be pinned to keep its content or linked together so they can show different views of the same note. Combine panes to set up your powerful workspaces.
With plugins, you can build your own note-taking toolkit like a Lego set.
Here are the current plugins, and we're constantly adding new ones: