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.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Resolver One - Resolver One is a program that blends a familiar spreadsheet-like interface with the powerful...
Gnumeric - Gnumeric
Excel Formula Beautifier - Beautifies Excel to JavaScript/JSON format.