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Math input with worked examples across several subjects

Replay recorded executions alongside a trading journal

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

Create narrated, annotated lessons with an interactive whiteboard for students.

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

Combine technical vectors, dimensions and raster reference in one drawing

Check annotated Python code for type inconsistencies before running it.

Tools to transform data, generate examples, and fine-tune models.

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

Prepare annotated screenshots while keeping the editable capture source.

Create annotated screenshots and consistent visual process guides.

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

Capture Linux interfaces and mark the steps that matter.

Capture and annotate Mac screenshots or frame a recorded demonstration.

Annotate and style screenshots across desktop platforms.

Capture, annotate and conceal details in Windows screenshots.

Capture, annotate and frame screenshots on a Mac.

Capture webpages or record screen-and-camera explanations, with local and cloud storage.

Algebra solving with topic examples and practice

English meanings connected to examples and related words

Definitions connected to sentence examples and grammar articles

Add part-of-speech and lemma information to text

Read scientific PDFs and export your notes on Mac

A Python property-based testing library that generates inputs to challenge the properties your code should preserve.