Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Gnumeric - Gnumeric
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Aspose.Cells for Cloud - Aspose.Cells for Cloud is a REST based API for processing spreadsheets in the cloud.
Apache OpenOffice Calc - Calc, part of the https://alternativeto.