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Prototype web and mobile forms, gestures and flows

Sales proposals with reusable content, interactive pricing, and conditional send approval

SQL exercises running against SQLite in the browser

AI toolset for Chrome tabs and sidebar

On-premise website analytics where an AI agent builds dashboards from plain English.

Listening lessons with transcripts, vocabulary and quizzes.

Open source agent that keeps your apps running 24/7.

Build formula-driven calculators for a website

Graph equations, inspect points and evaluate functions

Step-by-step SQL practice on themed data tables

Anatomy articles, diagrams and three-dimensional learning material

US economic accounts and regional data tools