Top EXCEL GitHub Repositories & Tools (2026)

An open-source Office workspace where people and AI agents create, collaborate, and review together.

OfficeCLI is the first and best Office suite purpose-built for AI agents to read, edit, and automate Word, Excel, and PowerPoint files. Free, open-source, single binary, no Office installation required.

Go language library for reading and writing Microsoft Excel™ (XLAM / XLSM / XLSX / XLTM / XLTX) spreadsheets

Lightweight and fast library written in C# for reading Microsoft Excel files

VTable is not just a high-performance multidimensional data analysis table, but also a grid artist that creates art between rows and columns.

Database Reporting Tool and Tasks (.Net)

Verifactu: Envío de registros de facturación a la AEAT

Dynamic Reports using Jasper Reports

MIT-licensed PowerShell document automation for Word, Excel, PowerPoint, PDF, email, PST/OST, OneNote, Visio, OpenDocument, and mixed-format Reader workflows.

Generate replayable Excel test cases from live browser pages, or run existing Excel cases, using Playwright and local Laya or a compatible decision API.

Automate real Microsoft Excel with AI via MCP Server or CLI — Power Query, DAX, VBA, PivotTables, charts, and 326 operations.