EBTCalc - Programmable Reverse Polish Notation (RPN) calculator that lets you create custom buttons.

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 .

FreeCommander - FreeCommander is an easy-to-use alternative to the standard windows file manager. The program helps you with daily work in Windows. Here you can find all the necessary functions to manage your data stock.

Numi App - Numi is a beautiful text calculator for Mac.

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

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