Even now we have a Microsoft Office-like freeware to help us to work on presentation, graph, writing and so on which is easier that most people recommended. OpenOffice is a open-source project office tool to install on your desktop and functions most of your Microsoft Office could do. Besides, it is a multiplatform and multilingual suite for OS. The suite including word processor, spreadsheet, presentation tool, drawing package, and portable app package. So you can take all the works wherever you go!