- Extentech
 - Offers Java SDK-based spreadsheet software downloads. - Gnumeric Spreadsheet
- Drop in replacement for commercial spreadsheets capable of importing existing Excel, 1-2-3, Applix, Sylk, XBase, and Oleo files.
- Google Docs & Spreadsheets
- Allows multiple users to created, edit, and share documents, spreadsheets, and presentations from any web browser.
- Microsoft Excel@
- VisiCalc Information
- History and commentary from its creators, Dan Bricklin and Bob Frankston.
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