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3 Maths Applications for 1 Price: Factor Calculator, Prime Number Calculator, Primality Tester. Recommended on The Math Forum @ Drexel (University) for Middle School, High School and College, ages 6+. Free one month trial. Only $4.95 for the suite

Hey, you've already paid $3000 for the hot computer, you might as well have a useful calculator! QuickCalc is a cool little tool which calculates as you type. Massive power and cute as a button. Try it out, you'll be hooked.

Hey, you've already paid $3000 for the hot computer, you might as well have a useful calculator! QuickCalc is a cool little tool which calculates as you type. Massive power and cute as a button. Try it out, you'll be hooked!

Convert hexadecimal strings to ASCII text and vice versa with a single click. Small application window allows simultaneous use with your favourite IDE, text editor, Word, etc.. Free one month trial. Only $4.95 for the suite of 10 utilities.

Test any number for primality with a single click. It uses a deterministic test and uses the Sieve of Eratophenes logic. Listed on the Math Forum @ Drexel (University) for Middle School, High School and College, ages 6+. $4.95 / 10 utility suite.

ComfortAir HVAC software is designed to be used by engineers, architects, contractors and energy auditors for calculating and analysing heating and air conditioning hourly loads in all types of buildings. Units can be set to English or Metric.