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A browser route sketcher with distance, elevation and GPX export

Serverless hosting for open language models through one API key.

A mobile time clock that can automatically punch workers in and out at scheduled job geofences.

Math and personal-finance calculation tools

A notepad that calculates alongside written working

Mechanical-design calculators with documented methods

Household carbon arithmetic with visible assumptions

Natural-language calculation beside short notes

Scientific expressions with dimensions checked as types

Molecular-biology quantities with visible formulas

Editable calculation tapes with comments and recalculation

Mathematical calculators arranged by course topic

UK home-energy research with calculators and regional tools

High-precision numerical expressions with custom functions

Nutrient and water calculations for planted aquariums

Arbitrary-precision arithmetic that keeps track of units

Mathematical calculators organized by learning topic

Mathematical solvers alongside lessons and formulas

Physics calculations with visual explanations

RF design formulas from attenuation to link budgets

Everyday calculation tools in one mobile app

Build formula-driven calculators for a website

Margaret Roach's garden articles, interviews and seed-timing tool

Mathematical and scientific calculators with practical forms