I like LibreOffice because is opensource with a great team development.
Can be used with Windows and Linux.
Today I will told about the Android OS and LibreOffice.
LibreOffice is now available on Android as a native application with this formats:
• Open Document Format (odt, ods and odp);
• Microsoft Office 2007/2010/2013 (docx, xlsx and pptx);
• Microsoft Office 97/2000/XP/2003 (doc, xls and ppt).
Named LibreOffice Viewer comes with a first preview of the editing functionality and is sized to APK:48 MB / App installed:81 MB.
I think is need to improve this application with viewer for epub and some ebook document formats.
This will remove some applications.
Note: Microsoft Office come with 1GB of RAM and also can be used.