Free & Open
Late comment: If you wanna throw up a little in your mouth, read this paragraph on ElasticSearch's page about why they continue to use words like "free" and "open": https://www.elastic.co/pricing/faq/licensing
> While we have chosen to avoid confusion by not using the term open source to refer to these products, we will continue to use the word “Open” and “Free and Open.” These are simple ways to describe the fact that the product is free to use, the source code is available, and also applies to our open and collaborative engagement model in GitHub. We remain committed to the principles of open source - transparency, collaboration, and community.
Apparently the "Free" in "Free & Open" simply means "as in beer." And the "open" does not mean "open source", but "source that is available." I'm pretty sure by this standard, Windows XP is Free and Open...