Using Google Doc Embedder one can easily embed many file types inside WordPress pages. Easily means that you doesn’t need to suffer from the problems of file type embedding, iframe issues etc. It allows better inline viewing and download (optional) of given file types. Also it doesn’t require Flash or PDF browser plug-ins required for viewing the embedded content.
LibreOffice is GPL-licensed free and open source office suite , with Writer, Impress, Calc spreadsheet, Base relational database frontend
Install using sudo apt-get install libreoffice-kde
KOffice suite is part of the KDE project and provides capabilities of OpenOffice suite without the licensing restrictions of OpenOffice. It can be used in any version of (K)Ubuntu. Install using: sudo apt-get install koffice
Xournal is a free (GPL-licensed) GTK/Gnome-based application for notetaking, sketching, or keeping a journal using a stylus. Install using( Remember: universe repositories must be enabled): sudo apt-get install xournal