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Render technical Markdown and notebooks into reports, books, slides, and websites.

Split, merge, and interleave PDF pages on desktop

Windows PDF text editing with OCR and document export

PDF organization with text-based splitting and numbering

PDF conversion for Office, iWork, and ebook workflows

Tile and filter PDF sewing patterns before printing or projection

Online PDF forms, editing, and signature requests

PDF table conversion with editable row and column definitions

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 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 common language for computational mathematics

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.

An engineering programming environment for developing algorithms, analyzing data, and visualizing results.

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