Gnumeric - The GNOME Spreadsheet.

The Gnumeric spreadsheet is part of the GNOME desktop environment: a project to create a free, user friendly desktop environment. As every other component of GNOME, Gnumeric is free software (Some other people like to call this OpenSource software) and it is licensed under the terms of the GNU GPL. Gnumeric is intended to be a drop in replacement for proprietary spreadsheets. We are not attempting to clone existing applications. However, we offer a customizable feel that attempts to minimize the costs of transition. Gnumeric will import your existing Excel, 1-2-3, Applix, Sylk, XBase Quattro Pro, Dif, Plan Perfect, and Oleo files.