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Excel Online - Excel Online, part of Office Online, is the online version of Microsoft Excel.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Gnumeric - Gnumeric
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.