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Check annotated Python code for type inconsistencies before running it.

A synchronized library for ebooks, PDFs and annotations

Recorded user journeys with step-by-step design annotations

PDF reading, forms, and annotations on mobile devices

Shared digital scores with annotations and playback

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

An independent ebook reader for Apple devices

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.

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

Build applications that access Dropbox files, metadata and sharing workflows through scoped API calls.

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

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.

Capture, annotate and style Windows screenshots through reusable tasks.

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.

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.

AI tool that summarises PDFs and webpages and helps with research and writing.