Apache OpenOffice - Wikipedia
Parts of the main window - Apache OpenOffice Wiki
LibreOffice - Wikipedia
How to Use LibreOffice: A Beginner's Tutorial
Apache OpenOffice - Wikipedia
Tips and Tricks - Apache OpenOffice Wiki
The Writer workspace - Apache OpenOffice Wiki
Writer User Interface - Apache OpenOffice Wiki
Using spreadsheets in Impress - Apache OpenOffice Wiki
LibreOffice Developer's Guide: Chapter 6 - Office Development - The Document Foundation Wiki
Parts of the main Calc window - Apache OpenOffice Wiki
Customizing the User Interface - Apache OpenOffice Wiki