Heavy users of the open source office suite, OpenOffice, looking to extend or add functionality should take a few minutes to browse the OpenOffice.org Extension Repository. Here you can find dozens of extensions (most of them free) which range from report creation to additional clipart galleries.

The site is pretty well organized for just perusing the available extensions. You can browse by application, popularity or highest rated. This is a great resource to potentially add the functionality you “wish” OpenOffice had.