Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
EtherCalc - EtherCalc is a web spreadsheet.
Apache OpenOffice - Apache OpenOffice is an open source, office document productivity suite.
Keikai - Effortlessly Build Spreadsheet-driven Web Apps
SoftMaker Office - SoftMaker Office is one of the most powerful and reliable office suite that is fully compatible with the MS Office Suite.
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.