Extending OpenOffice.org: Must-have OpenOffice.org extensions
As with Firefox, you can add new features and extend OpenOffice.org's functionality by installing extensions. Here some of the most useful ones to try.
The Annotation Tool extension solves two annoying problems with the built-in Notes feature in OpenOffice.org: you can't attach a note to a highlighted text segment, and you can't delete all the notes in the current document in one go. With the Annotation Tool you can do both.
OpenOffice.org doesn't natively support the SVG graphics format, which can be a bit of an inconvenience, especially considering how many good vector-based images are available in the Open Clip Art Library.