In terms of features, NeoOffice (donations accepted) is huge, truly a viable alternative to Microsoft office. It includes all the basic components: Writer, the Word processing component; Calc, for spreadsheets; Impress, the presentation module; draw, for the creation of graphics and diagrams; and Base, the database component. The spreadsheet component has some sophisticated features like Advanced DataPilot technology, Natural language formulas, an Intelligent Sum Button and a comprehensive range of advanced spreadsheet functions.
You are able to take tabular data, including numerical data, that is stuck within an editable PDF and convert it into an Excel spreadsheet. This makes it easy to use the vast tools that your Excel program offers to perform any type of analysis you want to do without re-copying data yourself. Another great benefit is giving accountants the ability to retain all format, graphs, and pictures that were in the PDF. This makes for a clean and fast conversion, interpretation, and creation back into a PDF without any format issues.