I have used Open Office from back when you had to compile it yourself. It's an interesting alternative to Office, and very close in most respects. Since I already have Office, I don't have the need to run the X11 shell just to run Open Office.
When all is said and done, some of the best application software I ever had was written for the Commodore 64, notably "Paper Clip", a tremendously full-featured word processor. Some of its features are still not available in the latest versions of MS Word.