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.
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.