If you are a Linux user then you must be fond of LibreOffice. LibreOffice is very popular office suite for Linux Platform and the best thing about this Office suite is its free and support Windows and Mac also. Mean you can open and edit DOC or DOCX file using LibreOffice. You can do it same for Mac also. Today they officially launched their LibreOffice version 4.0 after version 3.6.5.