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

A teaching whiteboard with video calls, lesson materials, and PDF or image annotation.

Write with Apple Pencil in an Obsidian vault and keep handwritten pages beside Markdown notes.

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

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

Handwritten study notes, PDF markup, audio capture, and AI-assisted review for students.

Write and annotate handwritten notes on Android with page layouts, linked notes, and PDF tools.

PDF remediation with automatic tagging and guided review

Create and automate PDFs on Windows

PDF content editing and organization on Windows and mobile

AI presentation maker that turns prompts or files into editable slides

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

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

A handwriting notebook that links notes and searches handwriting, Markdown, and PDF text.

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

AI spreadsheet plugin for Google Sheets and Excel

A handwriting notebook with note-linked audio, handwriting recognition, and PDF annotation.

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.

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

Education, science and culture statistics

Create a story and get it as a digital PDF or a printed hardcover.

Extract scanned text into TXT, Word, or Excel

Render, inspect, extract, and restructure PDFs from a terminal