Drafts-Keeper

Drafts-Keeper is a feature-rich and accessible program that comes in handy when you want to create and manage multiple password-protected and encrypted notes, fantasy or work-related books, along with personal diary or weblinks.
If you are a programmer, you can use the app to keep all your schemes and pieces of code and share them between your newly created projects. It's wrapped in a well-organized but outdated interface that can be used by everyone and comes with a tree structure, a word pad, and standard toolbar.

Design your tree and populate it with numerous entries

To get started, all you have to do is create a new book to which you can add as many folders and files as necessary. Existing notes can be inserted from the computer in TXT format in the structure. You have the option to rename the book, the directories and the files to best suit the content, move or copy them to different branches, as well as search for particular terms inside them.
When clicking on the parent node that being the novel, the tool displays a few details about it, such as name, location, size, last saved date and if it password-protected. To add a description just type it in the provided field. Same steps are applied to the other nodes as well.

Edit the content and safely secure your records

To set a password simply right-click on the desired document and input it. The key needs to have between one and 15 characters, and the mask option can be enabled, which hides the password from being viewed.
Unfortunately, the app doesn't provide and option to insert images, tables, symbols or hyperlinks to personalize the books to best represent you. All you can do is enter the date and time, change the font type, style and size, and customize the background with predefined colored-templates.

Conclusion

Taking everything into account, Drafts-Keeper is a handy and user-friendly utility that comes in handy when you want to create, organize and manage various types of books, as well as protect them from being accessed by using a unique key.