- Mariner Calc - For the Mac, version 9 or X. Description of the product, presentation of the company.
- The Spreadsheet Page - By John Walkenbach, author of the spreadsheet column for PC World magazine. Offers history, links, and illustrated jokes as well as files, FAQs, and release list for Excel, Lotus 1-2-3, and Quattro Pro.
- Sharp Tools Software - Proposes a Java, Excel-compatible spreadsheet.
- Spreadsheets Frequently Asked Questions - FAQ of the comp.apps.spreadsheets usenet newsgroup.
- eMiddleware - Provides spreadsheet technology to work with established systems. Company information and product description. In Germany and the UK.
- VisiCalc - One of the first "killer apps" for personal computers. Information from its creators, Dan Bricklin and Bob Frankston.
- mySpreadsheet: - Offers a multi-user, web-based spreadsheet system. Online demo and presentation of the company.
- Spreadsheet Tools and Their Producers - List of spreadsheets tools and books and their authors.
- European Spreadsheet Risks Interest Group - Promotes research regarding the extent and nature of the problem of spreadsheet risks.
- GNU Oleo - A GNU spreadsheet.
- Abykus - Full-featured object-oriented spreadsheet for Windows. Freeware.