Markdown editor, open source with good tables support for edition :

• ⭐⭐⭐ https://www.zettlr.com/
• ⭐⭐ https://www.jetbrains.com/ with plugin
• ⭐https://www.qownnotes.org/
• https://joplinapp.org/
• https://ghostwriter.kde.org/fr/
• https://keenwrite.com/
• https://www.marktext.cc/
• https://markflowy.vercel.app/ https://github.com/drl990114/MarkFlowy
• https://yank-note.com/
• https://zed.dev/ with plugin