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A free, open-source notebook for organizing notes in the browser or on desktop.

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

A local-first knowledge notebook that combines text, handwriting, boards, and linked notes.

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

A zoomable handwriting and planning notebook with sub-pages and document annotation.

An infinite canvas for notes, images, links, to-dos, and nested visual boards.

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.

A work planner with shared project boards, custom task properties, assignments, calendar, and notes.

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.

A local-first desktop notebook that stores Markdown notes and canvases on the user’s computer.

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

AI work platform for tasks, projects, calendars, meetings and docs

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.