Open Source C++ Calculators

PeaZip is a free archiver tool. The application provides an unified, natively portable, cross-platform file manager and archive manager GUI for many Open Source technologies like 7-Zip, FreeArc, PAQ, UPX. Create: 7Z, ARC, Brotl, BZip, GZip, PEA, TAR, WIM, XZ, ZPAQ, ZIP, Zstandard files and more Open and extract 200+ file types: ACE, CAB, DEB, ISO, RAR, ZIPX and more Features of PeaZip includes extract, create and convert multiple archives at once, create self-extracting archives (sfx), split files, strong encryption with two factor authentication, encrypted password manager, secure deletion, find duplicate files, calculate hashes, export task definition as command line script.

Integrated Development Environment for some microcontrollers based on 8051(e.g. AT89S8253). Supported languages are Assembly and C. It has its own simulator, assembler, editor and many other tools. See the project web site for more details and the newest updates.

Calculator is the open source version of the Microsoft Windows Calculator application. It is a modern Windows app written in C++ and C#, offering standard, scientific, and programmer modes, unit/currency conversion, date calculations, and history/memory operations. It ships preinstalled with Windows and is actively developed on GitHub. Standard Calculator functionality, which offers basic operations and evaluates commands immediately as they are entered. Scientific Calculator functionality, which offers expanded operations and evaluates commands using the order of operations. Programmer Calculator functionality, which offers common mathematical operations for developers, including conversion between common bases.

Developer-oriented emulator of the eZ80-based TI-84 Plus CE / TI-83 Premium CE calculators. CEmu is a third-party TI-84 Plus CE / TI-83 Premium CE calculator emulator, focused on developer features. The core is programmed in C and the GUI in C++ with Qt, for performance and portability reasons. CEmu works natively on Windows, macOS, and Linux! Easy setup - get running by doing a one-time-only connection of your calculator! Accurate and fast emulation. Customizable speed/throttling. Resizable calculator screen. "Always-on-top" window option. Screen capture (PNG). Screen recording (animated PNG). File sending/receiving (not for Apps/OS yet). Multiple keybinding presets. Emulation states for efficient saving / restoring. Color skins (like the real devices). Available in English, French, Spanish, and Dutch.

Precise Calculator has arbitrary precision and can calculate with complex numbers, fractions, vectors and matrices. Has more than 150 mathematical functions and statistical functions and is programmable (if, goto, print, return, for).

Qalculate! is a multi-purpose desktop calculator for GNU/Linux (now ported to Mac via MacPorts). It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (GTK+). Qalculate! has now moved to GitHub (https://github.com/Qalculate). Get the latest version from http://qalculate.github.io/downloads.html.

GraphCalc is a very gui graphing calculator. It has been called a good replacement for a TI-85. It is a must for any high school math student.

Advanced Trigonometry Calculator (ATC) is an open-source mathematical computing engine written mainly in C/C++. Created in 2011 and maintained by Renato Alexandre dos Santos Freitas, ATC is designed as a practical Windows desktop application for advanced calculations, automation, and technical problem solving. ATC supports equation solving, polynomial tools, complex numbers, matrix calculations, statistics, physics, geometry, unit conversions, DSP/FFT operations, and scripting. It can also process batch TXT files, making it useful for repeatable calculations and automated workflows. The project also includes ATC Online Alpha, a WebAssembly-based version that brings parts of the ATC engine to the web. ATC is released under the GPLv3 license and is made in Portugal.

An open source files hash calculator for Windows and macOS. * MD5, SHA1, SHA256 and SHA512. * Drag & drop. * Integrated with context menu in Explorer/Finder. * Support Windows 7 and later. * Support macOS 13 and later, with universal binary. * Support Dark Mode. * English and Simplified Chinese UI. The icon "希" is from hash in Chinese "哈希".

XiCalc is a scientific calculator, which evaluates a wide range of different expressions and supports standard mathematical functions. Additional functions and constants can be defined by the user. Latest version of source is for borland radstudio xe8. (can be downloaded at borland)

Extcalc is a multifunctional scientific graphic calculator for linux with features like graph drawing, graph analysis and calculating scientific functions including differentiation, integration and logic functions.

This is a simple calculator written in C++ with the Qt framework, without any extra features. A program for minimalists.

The TI-Basic compiler compiles TI-BASIC code to the 8XP file format used on Texas Instruments calculators, namely the TI-83, TI-83+ and TI-84+.

HexTool is a simple yet effective calculator/tool; invaluable for people who work with Hex and Binary. Now you can convert between Hex, Binary and Decimal on the fly. No install needed: just unzip and run it!

Multiple dielectric transmission line calculator using a 2D field solver to compute the transmission line characteristics from the circuit trace dimensions entered by the user.

Application to estimate the solar power available at a point on the Earth's surface given latitude, longitude, altitude and collector tilt, azimuth, etc.

Engineering Calculator is a lightweight, yet handy math expression evaluation and unit conversion utility that is always at your fingertips.

Simple dialog window to calculate the Standard Atmosphere properties (namely Temperature, Pressure, Density, and Speed of sound) using the altitude as input. It uses the published US Standard Atmosphere 1976 set of equations. Different unit conversions can be done directly within the interface. Useful for preparing CFD boundary conditions. The executable will write an .ini file from within the same folder it is launched. The ini file retrieves the interface options as well as positioning the window a the same spot as when it was last used.

Map viewer and planning utility for Grepolis. The program uses freely accessible data to produce maps and allows for strategical planning of game actions. Grepolis itself is a multiplayer online game and is the intellectual property of InnoGames GmbH To install grepotool, please download the ZIP-File and unpack it into a writable directory. In addition, you may need to install OpenSSL (32-Bit version) and copy three DLLs manually into the grepotool/bin directory. Attention: To include the newest server please read the Wiki or Ticket section. You can simply update the containing server.txt file with an text editor like notepad++.

The program evaluates ordinal expressions and relations. displaying the normal form output in plain text and/or TeX format. It supports notations for ordinals through and somewhat beyond those definable by the Veblen function.

Once upon a time there was a pocket calculator called the HP15C. It used a system called Reverse Polish Notation (RPN) for doing its calculations. The Fairwood Calculator is a RPN calculator designed for the computer.

The gNumerolgy is a numerology calculator program. You can calculate your number of name and number of birth. You can compare the relationship between two people or objects. You can compute any number of days.

Reverse Polish Notation interpreter for use as an interactive calculator in conjunction with the standard Python interactive interpreter. Easily extended by the user.

This is a somewhat advanced calculator made with C++.

This is a free, open source calculator of chess rating for tournament players. It has features like saving calculation with details. It has a multiplatform support thanks to Qt library, versions for Linux and Windows are released.