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Cloud-service cost estimates with inspectable assumptions

Azure cost scenarios from selected services and usage

Free voice calculator you speak to, in the browser or on iPhone.

Formulas and notes arranged on a mathematical worksheet

Monthly cost scenarios for planned cloud workloads

Topic-based calculators for practical questions

Mathematics and practical calculators by subject

Arithmetic, finance and programming modes in one app

Integration with visible input, steps and graphs

A searchable catalogue of calculations and conversions

Air-travel carbon estimates with a published methodology

A maintained HP-42S calculator simulator

Visual calculator forms with custom price rules

Graph equations, inspect points and evaluate functions

Equations explored through graphs and symbolic methods

An Android calculator with scientific mode and history

Engineering formula calculators by discipline

WordPress forms for estimates, payments, and front-end submissions

An iPad-first tutoring board that saves lessons as A4 pages in a book for each student.

Compare text contrast with its size, weight and colour direction in view.

A programmable Markdown knowledge base for personal notes, team knowledge, and documentation.

Research options in a browser or build on licensed historical datasets

Run GitHub Actions-compatible workflows on Depot compute with local-run and job-debugging tools.

Develop Python strategies with graphical backtesting and market gateways