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Check annotated Python code for type inconsistencies before running it.

Recorded user journeys with step-by-step design annotations

A synchronized library for ebooks, PDFs and annotations

PDF reading, forms, and annotations on mobile devices

Shared digital scores with annotations and playback

Capture, annotate and style Windows screenshots through reusable tasks.

Prepare annotated screenshots while keeping the editable capture source.

Editable vector drawing with pressure brushes and non-destructive effects

AI-powered UI design tool that turns text, screenshots, and sketches into editable mockups and prototypes.

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

Validate Python data against typed models and generate matching JSON Schema.

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

Calculate driving, walking, and cycling routes between ordered coordinates.

Select a screen region, annotate the detail and save the explanation.

Compose screenshot presentations with layers, frames and motion export.

Capture a page and style the screenshot for marketing or product updates.

Export a captured object with the units and up-axis its next application expects

Capture, annotate and frame screenshots on a Mac.

Give frontline teams visual, step-by-step work instructions and shared operational knowledge.

Human usability studies with assisted research analysis

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

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

An annotation-based Java test framework for organizing unit, integration, data-driven, and parallel test suites.

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