Search results

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

A desktop calculator with recall and configurable precision

An Android calculator with scientific mode and history

Build native desktop applications with a Go backend and a web-technology frontend.

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.

Scientific and everyday calculations with units

Mortgage broker that compares lender rates and shows the real cost of each loan.

A free, open-source notebook for organizing notes in the browser or on desktop.

Food nutrient lookup, comparisons and personal recipe records

Algebra entry with solving, factoring and graphing modes

Scientific expressions with variables and numerical calculus

A notepad calculator with variables and calendar expressions

Current-limiting resistor calculations for LED arrays

A simplified photovoltaic energy-production estimate

Instrument-specific observing calculations

Room-mode calculations for rectangular and shaped rooms

Plan prepaid travel data with a separate calling-number benefit