A preview of Google Spreadsheets, an open source web-based spreadsheet product, was released on June 6, 2006.
This new application will allow users to create or upload existing spreadsheets. Those spreadsheets can be shared online and collaboratively edited with others in real time. You can also chat with those people at the same time (see help).
Google Spreadsheets is in beta, meaning some critical features are still missing, including the ability to make graphs. The application is currently in a limited test period meaning only a limited number of users can access it. Google Spreadsheets is only available in English as of June 2006.
The macros in Microsoft Excel files are discarded if imported into Google Spreadsheets, decreasing the likeliood of viruses (see help).
Later, it became part of Google Docs.
The software behind Google Spreadsheets is available under the ICU license. This is compatible with the GPL but non-copyleft. The license allows others to use, copy, modify, merge, publish, distribute, and/or sell copies of the Software.
Parts of OpenOffice.org's Calc documentation are included in Google Spreadseets and these are available under a Creative Commons Attribution License.
See Google Spreadsheets legal notices for more info.