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.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Gnumeric - Gnumeric
iBus - Intelligent Input Bus.
Apache OpenOffice Calc - Calc, part of the https://alternativeto.