The most popular alternative is LibreOffice - Calc, which is both free and Open Source. If that doesn't suit you, our users have ranked 13 alternatives to dhtmlxSpreadsheet so hopefully you can find a suitable replacement. Other interesting dhtmlxSpreadsheet alternatives are Google Drive - Sheets (Free), Gnumeric (Free, Open Source), EtherCalc (Free, Open Source) and Sheetgo (Freemium).
- LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Synchronizing, online-based spreadsheet app, part of Google Drive.
- The Gnumeric spreadsheet is part of the GNOME desktop environment: a project to create a free, user friendly desktop environment.
- EtherCalc is a web spreadsheet. Your data is saved on the web, and people can edit the same document at the same time.
- Create workflows from your spreadsheet. Avoid buying software for every other process and use the technology you already know.
- Keikai is the only Web Spreadsheet designed and architected for big data — and is the fastest web spreadsheet regardless of size. Other advanced features include embeddable in your Web Apps, providing true Excel experiences and more.
- SC-IM - Spreadsheet Calculator Improvised – An ncurses spreadsheet program for the terminal.- CSV / TAB delimited / XLSX file import and export.
- wikiCalc is a wiki-based spreadsheet developed by Dan Bricklin and released under a GPL license.
- Power full data grid with artificial core and virtualization. Based on modern mutable approach and row/column recombination. All popular features and much more: cell, range edit, fixed rows, columns etc. Full customization: editor, render, header.