Gnumeric is a spreadsheet program. Gnumeric has the ability to import and export data in several file formats, including CSV, Microsoft Excel, Microsoft Works spreadsheets (*.wks), HTML, LaTeX, Lotus 1-2-3, OpenDocument and Quattro Pro; its native format is the Gnumeric file format (.gnm or .gnumeric), an XML file compressed with gzip.
Gnumeric can help you keep track of information in lists, organize numeric values in columns and rows, perform and update complex calculations by defining each step of the calculation and modifying particular steps subsequently, create and display or print graphical plots of data using bar plots, line graphs, pie charts or radar charts, implement complex optimization modeling or perform many other tasks involving numbers, dates, times, names or other data.
very nice