Open Office is one of free office suite that suitable for home and office user. It has word processor, spreadsheet, presentation tool like microsoft powerpoint, database and some other. You can find the detail information on open office website.
Some time we need to show or to hide gridline in openoffice calc. It is easy to do that. Open Option Menu and from the option left menu choose Openoffice calc then view. You can give "Visual Aid" a check mark on or off to show or to hide gridline.