Star Office = Proprietary (Purchased by Sun from StarDivision - a German Company in August 1999)
In July 2000, Sun releases OpenOffice.org (Based on Star Office) - OpenOffice.org is released as "Open Source".
(BTW - Sun had to officially change the name to OpenOffice.org due to legal requirements as "OpenOffice" was already being used/owned).
"Oxygen Office Professional was formerly known as Open Office Premium, so basically a modified version of Open Office with lots of extras that remind me of the extras that ship with Microsoft Office. The extras include more than 3400 images including clip arts and photos, more than 90 fonts, templates and sample documents, VBA support, better PDF support and lots more."
Link.