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GitHub - pugwonk/gif2xlsx: Convert GIFs to XLSX format
Polaris Office（ポラリスオフィス） ー 強力な互換性を備える新しいオフィスソフト
GitHub - SheetJS/sheetjs: 📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs
GitHub - matobaa/HashLink4Excel
GitHub - saulpw/visidata: A terminal spreadsheet multitool for discovering and arranging data
GitHub - tomk79/php-excel2html: Convert Excel(*.xlsx) to HTML Table. (with PHPExcel)
GitHub - seed-ui/seedtable: seed yaml <-> xlsx を相互変換するツール
