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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

Scientific calculation with RPN and programmable functions

A simple free desktop notebook with safe saves, version history, folders, and a focus mode.

A privacy-first, open-source knowledge base for structured personal notes.

Emulate complete machines or run programs built for another Linux or BSD architecture.

AI ASMR video generator powered by VEO3 AI technology

Collaborative analytics platform for SQL, Python, R, and dashboards

Private AI assistant for Mac and iOS that indexes your documents locally and redacts sensitive data before cloud AI calls.

Engineering formula calculators by discipline

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

Food nutrient lookup, comparisons and personal recipe records

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.