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 .
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Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
RealCalc Scientific Calculator - RealCalc Scientific Calculator
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Event Viewer - Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.