Resolver One - Resolver One is a program that blends a familiar spreadsheet-like interface with the powerful...
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Excel Formula Beautifier - Beautifies Excel to JavaScript/JSON format.
Gnumeric - Gnumeric
FlexiSheet - FlexiSheet is a multi-dimensional spreadsheet in the spirit of Lotus Improv.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.