StarOffice was originally created by German company Star Division, later bought and GPLed by Sun Microsystems. Binaries are available for Windows, Linux, Solaris and OS/2.
StarOffice was notorious for bloat - it was known as the "Microsoft Office for Linux", in both good and bad senses of the phrase =)
Good because StarOffice is very featureful, just as useful as all others out there, isn't too buggy, and can also import most of the Office stuff; Bad because it's big and slow.
Personally, I downloaded version 4.0 which was an 80 megs
tarball. Well, 5.1 was more than 120 megs installed... and my 5.2 install is 251 megs! We're truly talking of MSOffice-caliber bloat here...
It was also notorious for its "Desktop" approach; In Windows, it replaced the Windows desktop with its own, and in Linux, it generated a huge window under which it rendered everything in Windows 95-style windows.
StarOffice 6.0 fixes a lot of things when it will be released (a beta is already out): The integrated desktop is gone, it saves files in XML format, and is somewhat lighter, too.
Home pages, as of writing: