Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
SSuite Axcel Professional Spreadsheet - This powerful and professional spreadsheet has all the tools you need to calculate, analyse, summarize, and present your data in numerical reports or colourful graphics.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
EtherCalc - EtherCalc is a web spreadsheet.
Keikai - Effortlessly Build Spreadsheet-driven Web Apps
Simple Spreadsheet - Simple Spreadsheet