Open arms 4.0
Open Office has been Oracle for a while. Which may somehow makes it less Open Source than when you started out. You either like that or you don’t or you simply don’t care.
If you do not care: Read up. Unless you just don’t care.
Whatever. There is an alternative: http://www.libreoffice.org/
Release 4.0 is out there now.
(And it still crushes on me more often than not, and I do care.)
But then, I am a devoted Keynote fan. (Even if it has not been updated for ages.)