1)   Time Calculator Pro v2 2.20
Add, minus, divide and multiply time values in hours, minutes and seconds. Convert from fractional values and vice-versa. Use the DAE (date analysis engine) to find the day of any date in the Gregorian calendar within a range of up to 15 centuries.
time, calculator, add, minus, subtract, divide, multiply, gregorian, calendar, analysis,

 2)   Time Calculator Deluxe Edition 1.5
Add, subtract, divide and multiply time values in days, hours, minutes and seconds. Convert to and from fractional units. Find the day of any date in the Gregorian calendar within a range of up to 15 centuries and perform military time conversion.
time, calculator, deluxe, edition, add, minus, subtract, divide, multiply, gregorian,

 3)   Time Calculator 1.1
Add, minus, divide and multiply time values in minutes and seconds.
time, calculator, add, plus, minus, subtract, divide, multiply, times, minutes,