unioffice

? SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs

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

Luckysheet is an online spreadsheet like excel that is powerful, simple to configure, and completely open source.

The project has been migrated to @wolf-table/table https://github.com/wolf-table/table

A pure PHP library for reading and writing spreadsheet files

Univer is a full-stack framework for creating and editing spreadsheets, documents, and slides on both web and server.

Jspreadsheet is a lightweight JavaScript data grid component for creating interactive data grids with advanced spreadsheet controls.

A web based file manager,web IDE / browser based code editor

Go library for reading and writing XLSX files.

File Parser optimised for LLM Ingestion with no loss ? Parse PDFs, Docx, PPTx in a format that is ideal for LLMs.