Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
XML Copy Editor - XML Copy Editor is a fast, free, validating XML editor.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Liquid Studio - XML Tools Provider: XML Studio - Graphical XML Schema Editor.