Full-featured object-oriented spreadsheet for Windows. Freeware.
European Spreadsheet Risks Interest Group
Promotes research regarding the extent and nature of the problem of spreadsheet risks.
A GNU spreadsheet.
Spreadsheet Tools and Their Producers
List of spreadsheets tools and books and their authors.
Spreadsheets Frequently Asked Questions
FAQ of the comp.apps.spreadsheets usenet newsgroup.
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.
One of the first "killer apps" for personal computers. Information from its creators, Dan Bricklin and Bob Frankston.