Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
ChatWhale - Gamify your customer communication and loyalty rewards
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Open Loyalty for Startups - Open source stack for building customer focused products
Apple Numbers - Numbers lets you build beautiful spreadsheets on a Mac, iPad, or iPhone — or on a PC using iWork for iCloud. And it’s compatible with Apple Pencil.