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iPhone money notebooks organized by folders, people and tags

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

An open-source academic notebook that brings Markdown notes, PDF annotations, and literature management together.

A private research notebook that runs entirely on your own machine.

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

AI research partner that answers from the sources you add

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

Notebook-based symbolic and numerical computation

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.

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.

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

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.

An Android handwriting workspace with notebooks, PDF markup, sticky notes, and corkboards.

Search financial documents and trace research back to its sources

A workout notebook with exercise history and progress views

A visual knowledge notebook for connecting research, highlights, and ideas on whiteboards.