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

Write naturally by hand and add PDF pages to notes for markup.

A browser-based shared math canvas for handwriting, graphs, sliders, and PDF assignments.

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

A tutoring classroom with an interactive whiteboard for annotating PDFs, worksheets, slides, and images together.

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.

Prepare annotated screenshots while keeping the editable capture source.

Capture and present Windows screenshots with an integrated design-tool set.

Capture Linux interfaces and mark the steps that matter.

Annotate and style screenshots across desktop platforms.

A collaborative sketchboard that connects shared ideas to projects and tasks.

A developer SDK for embedding a real-time, collaborative whiteboard into web, mobile, and desktop applications.

PDF content editing and comment export across devices

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

Capture, annotate and conceal details in Windows screenshots.

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

Browser PDF markup with image and page tools

Annotate lesson materials together with subject-specific drawing tools for online teaching.

A browser-installed notebook for handwriting, PDF markup, and recorded lectures that works offline.

An open-source notebook with a freeform canvas, handwriting, Markdown, and local files.

Evaluate, monitor, and govern LLM apps in one workspace

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

PDF reading, forms, and annotations on mobile devices