Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Google Open Source - All of Googles open source projects under a single umbrella
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
SmallDevTools - Handy developer tools with a delightful interface
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
whatdevsneed - This is whatdevsneed.