What are some alternatives?
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Google Drive - Sheets - Synchronizing, online-based word processor, part of Google Drive.
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.
Sheetgo - Create workflows from your spreadsheet.
EtherCalc - EtherCalc is a web spreadsheet.