SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.

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.

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.

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.

NoteCalc - Browser-based notepad built for math calculations.

Calculator OSX App - Real Time.