Best Open Source Calculators 2026

Calculators

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Browse free open source Calculators and projects below. Use the toggles on the left to filter open source Calculators by OS, license, language, programming language, and project status.

MongoDB Atlas runs apps anywhere
Deploy in 115+ regions with the modern database for every enterprise.

MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.

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Safetica Data Loss Prevention Software for Businesses
For companies that want to protect their sensitive data against leakages, insider threats and want to be compliant with regulations.

Safetica is a cost-effective, easy-to-use Data Loss Prevention (DLP) solution. It performs security audits, prevents sensitive data from leaving your company, and sheds light on what is going on in your organization.

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1

PeaZip

Free Zip software and Rar extractor

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.

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115 Reviews

Downloads: 2,374 This Week

Last Update: 2026-02-07
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2

cgtkcalc

A simple calculator for complex number calculation.

A simple scientific calculator for complex number calculation. It requires the GTK+ toolkit.

Downloads: 1 This Week

Last Update: 2017-03-20
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3

Calculas

A calculator that will contain the most equations in mathematics.

Downloads: 0 This Week

Last Update: 2013-04-02
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4

Mousam's Pocket Calculator

A simple calculator using C#

this is a perfectly homemade calculator using c# language.this is very simple coding as well as design logic.you can download from here http://sourceforge.net/p/mycalculator . if you like this then please give Review and if you face any kind of problem by using it then also give Review; otherwise I can’t understand my mistake . Thanks .

1 Review

Downloads: 0 This Week

Last Update: 2013-06-27
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Go beyond a virtual data room with Datasite Diligence
Datasite Diligence, helps dealmakers in more than 170 countries close more deals, faster.

The data room with a view. Evolved for next-generation M&A. Built on decades of deal experience. Packed with expert tools, yet intuitive for novices. A fully mobile platform with frictionless processes. Smart AI tools that let you close more deals, faster, plus end-to-end support at all times. Do due diligence with intelligence.

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