I have to admit, one of the cool things about WordPerfect was that besides DOS and Microsoft Windows, it was available for a wide variety of computers and operating systems, including Mac OS, Linux, the Apple IIe, a separate version for the Apple IIgs, most popular versions of Unix, VMS, Data General, System/370, AmigaOS, Atari ST, OS/2, and NeXTSTEP.
While not as comprehensive in this regard, OO binaries are available for Linux, Solaris (Intel and Sparc), Microsoft Windows and OS X. In fact if it wasn't for this, quite honestly I probably wouldn't be using OO right now. I have some Linux boxes and it's handy to have on them.