Gnumeric is intended to be a drop in replacement for proprietary spreadsheets. It imports your existing Excel, 1-2-3, Applix, Sylk, XBase Quattro Pro, Dif, Plan Perfect, and Oleo files among others. The latest version 1.4.0 brings some major new features including:A port to GTK+ 2.4, and bugfixes. Charting engine improvements in progress include single point formatting, bubble plots, error bars, and radar plots. Work on rich text editing for cells has started. The new file selector is now used. The Win32 port is now almost complete. The gconf dependency is being compartmentalized and should be ready to drop out for the next release. Charting engine improvements. Image export for xls has been implemented. Improved compatibility with MS formulas. A Paradox db importer has been added and the Psion importer revived. Switched to a SAX-based exporter for .gnumeric files. Old code was cleaned out, printing improvements were made, grid lines were added for charts, and the documentation was improved.
Additionally, AbiWord 2.2.0 was released (not officially announced yet either). The impatient can get the files here, which includes a Mac OS X version.