TheTimeCalculator.org - The time calculator helps you either add/subtract times in hours, minutes, and seconds to a given date.

lwty.org - worksheets or practice exercises, calculators & answer sheets to engage the grade school...

Calculator-online.net - The 100% free and reliable online calculators that help you to solve any calculation-related problems and provides you with the precise measurements.

Free42 - Free42, an HP-42S calculator simulator

SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .

Calculatored - Calculatored presents the variety of calculation tools. Whether you are a Student, Teacher or a Businessmen you can find the best tool for your requirement.