Even with several details altered, Stoker’s heirs sued over the adaptation, and a court ruling ordered all copies of the film to be destroyed. However, several prints of Nosferatu survived, and the film came to be regarded as an influential masterpiece of cinema and the horror genre.
“Open source” can be co-opted to mean any project with public source code even if it’s not open contribution (think SQLite, and many of the projects effectively run by major tech corporations).
“Free software” falls victim to the eternal mixup with freeware, requiring the endless repetition of the “beer vs. speech” analogy.
I personally think “Libre software” is the term that best encapsulates the intended meaning while being unambiguous and not vulnerable to misinterpretation.