OxygenOffice Professional (formely know as OpenOffice.org Premium) is a free and open source enhancement of official OpenOffice.org plus some Extras for you to use.
Additional features include:
- Clip Art (currently more than 2,900 objects)
- Templates (number varies by language)
- Samples (number varies by language)
- Documentation (if available)
- Fonts (more than 90 fonts)