Resolver One - Resolver One is a program that blends a familiar spreadsheet-like interface with the powerful...
Aspose.Cells for Cloud - Aspose.Cells for Cloud is a REST based API for processing spreadsheets in the cloud.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
EtherCalc - EtherCalc is a web spreadsheet.
XCubes - Multidimensional spreadsheet for financial simulation, planning, reporting, marketing analysis etc.
Simple Spreadsheet - Simple Spreadsheet