A calendar and a timeline of the note's creation and modification.
Perform cleanup tasks on your vault.
Computer algebra system and calculator.
Create, edit and search sets of notes like Notion or AnyType DBs.
Work with spreadsheets inside your notes.
Synch web pages to Markdown and integrate with read-it-later apps (Pocket, Instapaper).
Open marimo (.py) and Jupyter (.ipynb) notebooks as interactive embedded views.