3D-Calc: Proposes a free three-dimensional spreadsheet program for Atari ST computers.
Abykus: Full-featured object-oriented spreadsheet for Windows. Freeware.
eMiddleware: Provides spreadsheet technology to work with established systems. Company information and product description. In Germany and the UK.
European Spreadsheet Risks Interest Group: Promotes research regarding the extent and nature of the problem of spreadsheet risks.
GNU Oleo: A GNU spreadsheet.
GS-Calc: Offers 512 columns and 2,097,152 rows, hierarchically organized worksheets, 2D and 3D charts, unlimited undo/redo, OLE client/server and COM functions. Description and screenshots of the program, online ordering.[Win9x/ME/2000/XP]
Mariner Calc: For the Mac, version 9 or X. Description of the product, presentation of the company.
mySpreadsheet:: Offers a multi-user, web-based spreadsheet system. Online demo and presentation of the company.
Sharp Tools Software: Proposes a Java, Excel-compatible spreadsheet.
Spreadsheet Programming Help: Provides programming and design support and training.
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: Spreadsheet help, history, links, and even illustrated jokes. Files, FAQs, and release list for Excel, Lotus 1-2-3, and Quattro Pro, but mostly Excel. By John Walkenbach (JWalk and Associates), author of the spreadsheet column for PC World magazine.
VisiCalc: One of the first "killer apps" for personal computers. Information from its creators, Dan Bricklin and Bob Frankston.
Visual Baler Spreadsheet Compiler: Create windows applications from spreadsheets without programming.