Noteless: Markdown note-taking

Features

* Markdown-optimized editor with syntax highlighting
* Supports Github Flavored Markdown, KaTeX and mermaidjs for diagrams
* Open-Source
* Tags for organizing your notes
* Pin, Star and sort your notes by title or different dates
* Very themable - dark/light mode and accent color
* Full-text search
* File Attachments that can be embedded into a note
* Multi-Note Editing
* Slide actions for easier editing
* Tutorial notes which explain how to use the app

Source Code + Support: https://github.com/redsolver/noteless