Oracle...
As has been said by people less kind than myself:
One Raging A**hole Called Larry Ellison
Before you laugh it off, I have personal reasons to be annoyed. My company hired them to incorporate their product into our systems. They failed to do so. We gave them additional time, a lot of it. They failed to do so. I kicked them out for breach of contract - and because my employees were tired of dealing with them.
So, Oracle sued me.
We won but ended up paying all the legal fees.
Oracle owns MySQL as well, for those who do not know. As I recall, that's why we have LibreOffice. That same deal included OpenOffice. So, it got forked. It was a SUN thing.