SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.
NumWorks - The graphing calculator that makes learning math easier.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
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Calcbot for Apple Watch - Calculate, convert, and split tips from your wrist
Event Viewer - Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.