Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.