NumWorks - The graphing calculator that makes learning math easier.

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

Rule of 3 Calculator - Apply the mathematical Rule of Three in an easier, faster and more practical way!

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 .

PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...

Event Viewer - Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.