I'm a big fan of LibreOffice. I've used it to write everything from A THRONE OF BONES to SJWs ALWAYS LIE and it's been a big help in preparing the works of others for formatting into ebooks. If you're not using it yet, you really should take a serious look at it, because whether you need to replace all the italics or kick out a PDF, it just works.
While I've been experimenting with Scrivener for A SEA OF SKULLS, I still find myself returning to LibreOffice for short stories like "Amazon Gambit" and pretty much everything else. And, let's face it, it's impossible to beat the price.