Engineering Calculator and Unit Converter
Calculator++
RxCalc is a calculator for the analysis of multi-stage receiver.
A calculator to work with historical dates and calendars.
Grepolis utility
EuroNCAP Grid Point Calculator
Calculator with fractions
Convert between calendars and work with date ranges.
A calculator for doing lots of things.
3-DPhysicsSim is an interactive 3-D physics simulator.
A multi-step heat calculator.