The latest version of the whistleblowing platform SecureDrop runs on the Qubes operating system. At the Guardian we used the Salt management engine to set up a Qubes environment where journalists could safely interrogate sensitive documents.
I love the fact how all the things they list make sense for security and then there's just:
A Nautilus extension
Of course, when reading on, the article mentions it's there for convenience to avoid having to open a terminal, but I still found it really funny when reading the list.