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A natural-language calculator for units, dates, finance, and developer math.

AI video tutor for math and STEM questions.

Create reusable chart conditions and filter stock watchlists

Interactive calculators, quizzes, and forms with personalized result screens

Advanced interaction prototypes across devices

AI spreadsheet that connects to databases and apps, answers questions in plain English, and builds charts and models.

A Markdown notebook that keeps notes in a Git-backed repository and works in the browser or desktop apps.

Structure team knowledge in a page tree with rich blocks and links to active work.

Chrome extension that saves ChatGPT conversations as PDF, Markdown, Text, CSV, JSON, or Image files.

Modular WordPress SEO settings, structured data and content guidance.

A local Markdown editor for people who want rich text and source files in their own folders.

Convert documents between Markdown, HTML, LaTeX, Word, and other markup and word-processing formats.

Bread recipes and practical references for ambitious home bakers

Windows PDF annotation with formulas and drawing measurements

AI-native Markdown notes with encrypted sync for developers

AI spreadsheet plugin for Google Sheets and Excel

Formula calculators with selectable input units

Programmable scientific arithmetic with saved formulas

Circuit and electrical formulas grouped by task

Molecular masses, formulas and isotope distributions

Custom estimate forms with formulas and conditional fields

Dynamically generated maths worksheets covering arithmetic, algebra and other school topics.

Mathematical calculators organized by learning topic

Mathematical problem entry with a structured symbol palette