I'm pretty sure Pandoc has an option to interpret org-mode style tables in Markdown files, and Org-mode itself has a mode for editing tables in non-org files. I

I'm pretty sure Pandoc has an option to interpret org-mode style tables in Markdown files, and Org-mode itself has a mode for editing tables in non-org files. I haven't played with either, however, so I can't report on how well they work.