LocalNote от Sam Bent

Notes and todos in your sidebar.
Create, edit, tag, search, and organize everything stays in IndexedDB on your machine.
No accounts, cloud, or tracking.

Features:
5 color themes with dark/light modes,
fuzzy search,
markdown rendering,
todo mode with due dates,
drag-to-reorder,
templates,
note linking,
bulk operations,
JSON export/import.