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Write with a stylus in flexible notebooks that can also hold and annotate PDFs.

A multi-format notebook for handwriting, PDFs, voice notes, and study documents.

Keep research notes, papers, quotations, writing, and citations together in a project notebook.

An open-source desktop notebook for stylus handwriting, PDF markup, layers, and audio notes.

Maintain linked wiki pages in a local, plain-text notebook.

iPhone money notebooks organized by folders, people and tags

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

A collaborative computing workspace where projects bring notebooks, files, terminals, and software into a shared environment.

A local Markdown notebook that turns notes into links, tasks, and searchable topics.

Keep rich-text or code notes in a hierarchical tree stored in a single database or file collection.

A self-hosted Markdown notebook with collaboration, search, and note history.

An Android outliner for Org-mode notebooks, nested notes, tags, and manually synchronized files.

Work with notebooks, code files, consoles, and terminals in a browser-based interactive development environment.

An AI notebook that checks facts, links related ideas, and helps keep notes current.

An open-source iPad notebook for Apple Pencil writing and PDF markup.

A shareable infinite drawing board for handwriting, tutoring, diagrams, and PDF markup.

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

An open-source notebook for multimedia notes, attachments, and personal reference material.

Store notes and files in an encrypted notebook that syncs across devices.

Computer-science foundations taught through programming problems

Notebook-based symbolic and numerical computation

Proxima Nova, original display fonts and the free Anonymous Pro coding family.

A local-first team notebook for real-time collaboration on plain Markdown files.

A handwritten notebook for Apple Pencil notes, PDF markup, study tools, and creative pages.