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Write naturally by hand and add PDF pages to notes for markup.

A free, open-source Markdown editor for research notes and long-form writing.

Keep quick Markdown memos on infrastructure you choose and retrieve them through search.

A notebook app for Mac, iPad, and iPhone with hierarchical pages, handwriting, and cloud sync.

A local-first personal knowledge workspace for private notes, linked objects, and databases.

Organize research notes, themes and key insights

Manage health-practice calendars, patient booking, billing, notes, and workflows in one system.

Collaborate on an online canvas with sticky notes, drawing tools, comments, timers, and board templates.

Keep direct and group conversations in context with channels, threads, reactions, and voice notes.

Read study PDFs and make notes as part of one annotation workflow.

Capture ideas, map processes, and discuss decisions on a shared whiteboard.

A digital Obeya platform for visual management rooms, Lean and Agile rituals, and organizational alignment.

Build a hierarchical personal knowledge base locally or on a self-hosted server.

A private Markdown second brain that also supports shared, searchable company knowledge.

A connected note system with rich-text editing, hubs, collections, and built-in journaling.

A distraction-free Markdown editor for local notes on Windows, macOS, and Linux.

A free Markdown writing workspace with live preview, local files, and exports.

A desktop note environment for Markdown, source files, mind maps, PDFs, and other formats.

A free Markdown notebook that stores notes as ordinary files and offers optional encrypted sync.

Capture thoughts as different kinds of note cards, from text to sketches and audio.

Note taking tool with flashcards, PDF annotation, and AI study features

An iPhone and iPad notebook for handwriting, PDF markup, audio notes, and searchable study material.

AI note taker that turns voice, audio, video and text into structured notes.

Handwritten notes with live audio transcription and AI study tools