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AI photo tracking for daily carbon impact

Air-travel carbon estimates with a published methodology

Turn source code into a styled image with editable colours and spacing.

Subject calculators and a custom calculator builder

Household carbon arithmetic with visible assumptions

An icon library with size-specific artwork and documented UI behavior.

Emissions estimates for travel, homes and events

A keypad calculator with clear, memory and percentage controls

Onchain limit, range and recurring trading strategies

A graphing-calculator emulator in the browser

A TI graphing-calculator emulator for classroom explanation

Everyday calculation categories with a simple keypad

IBM’s open-source components, patterns and design guidance

Everyday calculations with topic-specific explanations

Programmable scientific arithmetic with saved formulas

Scientific, graphing, fraction and matrix calculations

Readable calculators for quick everyday tasks

Organize dividend portfolios and compare income-growth scenarios

Nutrient and water calculations for planted aquariums

Standard, scientific, programmer and date calculations

Android scientific calculation with symbolic and graphical tools

A handheld-style scientific calculator for Android

Linked mathematical views for algebra, geometry and graphs

Cloud-service cost estimates with inspectable assumptions