Evernote keeps all your notes, thoughts and references safe and secure. It allows you to capture pretty much anything digital into it and keep it for yourself, or share it with others.
Collaboration is encouraged through Evernote. In the past I have created shared notebooks to start a business. I am currently sharing notebooks for my work and for writing Do Better With Asana. The ability to have multiple people view and retrieve information, any information, in a single repository is stupidly simple and incredibly powerful at the same time.
So what happens when there is sensitive information that is part of a note in a shared notebook? How can you keep the bulk of that content available to others, while ensuring the rest remains confidential, without destroying the integrity of the content and its surrounding context?