do they provide productivity?

Obsidian is a note-taking app that lets you create a personal knowledge graph with ease. It is designed for non-linear thinking and allows you to easily link your notes together wiki-style.

A modern macOS markdown editor - themeable, tabs, sidebar, GitHub flavored markdown, exporting, latex and more.

Markdown editor for Mac, Windows, and Linux with real-time preview and distraction-free interface. Open source, free on GitHub, supports various Markdown specs.

The original trilium is transfered to this repo by its owner and the app continues to develop here as stated here: https://github.com/TriliumNext/Trilium

Streamline teamwork with real-time collaboration, drag-and-drop content organization, and visual simplicity across notes, tasks, wikis, and databases.

Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.

A simple note taking application for your computer focused on privacy, using PGP keys to encrypt all your notes by default.

Comprehensive writing tool for notes, citations, and drafting with privacy-first features and multi-language support, perfect for diverse writing tasks.

Open source note-taking app with Markdown support, to-do integration, and synchronization with cloud services like Dropbox and OneDrive.

An end-to-end encrypted note-taking by Proton. Offline access, unlimited sync across devices, tagging, passcode and biometric security, plus advanced premium privacy features.

Flexible writing and note-taking tool with markdown, plain text storage, cross-note links, hashtags, powerful search, Focus Mode, iCloud sync, and export options.

ghostwriter is a feature-rich text editor using Markdown syntax which makes it suitable for note-taking, document redaction, simple HTML website creation and much more.

A cross-platform Markdown editor providing real-time preview, Focus & Typewriter modes, and support for multiple export formats.

A markdown editor for desktop.

Simple but configurable and themeable, distraction-free text editor for writers. Open-source and available across desktop platforms.

Ulysses is a text editor for creative writers. Used by bloggers, poets, students and published novelists all over the world, it offers an integrated environment to brainstorm, draft, revise and even submit text on a professional level.

Microsoft OneNote, part of the Microsoft 365 Copilot, is a digital notebook application that gives people one place to gather notes and information. It also offers shared notebooks, syncing between multiple computers and devices via Windows...