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? 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

Image Polygonal Annotation with Python (polygon, rectangle, circle, line, point and image-level flag annotation).

The free and privacy-friendly screen recorder with no limits ?

A pure PHP library for reading and writing spreadsheet files

Open source annotation tool for machine learning practitioners.

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.