HyperFormula is an open-source headless spreadsheet for business web apps. It comes with over 400 formulas, CRUD operations, undo-redo, clipboard support, and sorting.

Jace.NET is a calculation engine for the .NET platform.

Calculation engine of the Energy Transition Model

Agile Dashboarding, anywhere

gojacego is a calculation engine for Golang.

A metadata store database for GuinsooLab stack.

Java-based payroll module that automates salary calculations for retail staff, processing bonuses and legal pension deductions.

Captain is a C program that calculates possible moves of ships.

calculation engine poc

a jace transform for transformalize

PHP engine for expression-based calculation models with topological dependency resolution, cycle detection, and scenario/year axes.

A collection of C# WPF spreadsheet samples demonstrating how to load, edit, compute, and export Excel-compatible sheets (XLSX, ODS, CSV, PDF) without Excel. Features custom formulas, database binding, conditional formatting, print-ready invoices, and project planners using the MindFusion.Spreadsheet.Wpf NuGet package.

A performance-oriented C# utility for real-time data visualization and event-driven trade analytics. Features a dynamic UI engine for on-the-fly inventory rendering, automated ratio calculation, and XML/CSV-backed data persistence for high-throughput decision support.

Resistance calculator for bringing a given input voltage down to one or more desired output voltages.

Create your own AI, Neural Networks, Text Predictors, and more...

Excel for firmware — instantly evaluate C/C++ macros, constants, and YAML formulas with real computed values inside VS Code

Headless Excel 365 calculation engine (C++17) — WASM, Python, and native CLI.