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Create and automate PDFs on Windows

PDF content editing and organization on Windows and mobile

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

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

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

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.

A code and text editor with configurable search across the current file and other open documents.

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.

Read and listen to chosen content while collecting vocabulary.

Room-based polls and moderated feedback for teaching and training

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

On-device AI SDKs for voice, language, and vision

AI flashcard generator that turns files, notes, and YouTube videos into Anki decks.

AI writer that generates copy, content and images from short descriptions.

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