Framacalc is described as 'an online collaborative spreadsheet.
Currently it is uses Ethercalc software that is hosted on servers of Framasoft association' and is a Spreadsheet in the Office & Productivity category. There are more than 10 alternatives to Framacalc, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Android Tablet. The best alternative is LibreOffice - Calc, which is both free and Open Source. Other great sites and apps similar to Framacalc are Microsoft Office Excel (Paid), Google Drive - Sheets (Free), EtherCalc (Free, Open Source) and Apache OpenOffice Calc (Free, Open Source).
LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.org Calc, professional data miners and number crunchers will appreciate its comprehensive range of advanced functions.
EtherCalc is a web spreadsheet. Your data is saved on the web, and people can edit the same document at the same time. Everybody's changes are instantly reflected on all screens. Work together on inventories, survey forms, list management, brainstorming sessions and more!